The Cross and the Resurrection: An Introduction to Christianity

The Cross and the Resurrection: An Introduction to Christianity

From Intellegix, this is Intellegix World Religions — an educational look at the world's religions. This show neither endorses nor rejects any belief.

Today we are going to spend time with one of the most consequential movements in the history of human civilization — a tradition that began in a small, politically occupied corner of the ancient Mediterranean world and grew, over two millennia, into a global phenomenon practiced by more than two billion people on every continent of the earth. By the end of this episode, you will have a clear, grounded understanding of where Christianity came from, how scholars trace its earliest development, what its core beliefs are as adherents themselves describe them, how Christians actually live and worship in all their extraordinary variety, how the tradition has fractured and renewed itself across the centuries, and what some of the most pressing questions facing Christianity look like in the twenty-first century. This is not a small story. So let us begin at the beginning — or rather, at the world into which that beginning arrived.

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The first thing to understand about the origins of Christianity is that they are inseparable from the world of Second Temple Judaism. The Temple in Jerusalem — the great Second Temple, rebuilt and magnificently expanded under Herod the Great — was the gravitational center of Jewish religious life in the first century of the Common Era. Around it swirled an enormously diverse Jewish world: Pharisees, who emphasized Torah study and oral tradition; Sadducees, a priestly elite closely tied to Temple ritual; Essenes, who had withdrawn to the desert in protest of what they saw as a corrupted priesthood; Zealots and other revolutionary movements, who burned for liberation from Roman occupation; and a broader popular religion alive with apocalyptic expectation — a widespread conviction that God was about to act dramatically in history to restore Israel and inaugurate a new age. Scholars of this period emphasize that Judaism in the first century was not a monolith. It was a richly contested, vigorously debated tradition with many internal parties and many competing visions of what faithfulness to Israel's God required.

Into this world, in a region called Galilee in the northern part of Roman-occupied Judea, a figure named Jesus was born. Christians hold that his birth was miraculous — that he was conceived by the power of the Holy Spirit and born of a woman named Mary, who was a virgin. Scholars note that the accounts of Jesus's birth appear in only two of the four canonical gospels — Matthew and Luke — and that these accounts differ in various details, generating long-running scholarly discussion about their historical relationship and literary purposes. What the majority of historians, religious and secular alike, do accept is that Jesus of Nazareth was a real historical person — that he lived in first-century Galilee, that he was associated with John the Baptist, that he gathered followers, that he taught widely in Galilee and Judea, and that he was crucified by Roman authority under the prefect Pontius Pilate, almost certainly sometime around 30 or 33 of the Common Era. The historian Josephus, writing later in the first century, refers to Jesus in a passage that, even accounting for later Christian additions, most scholars regard as containing an authentic core. The Roman historian Tacitus, writing in the early second century, refers to Christ and his execution under Pilate. These references, sparse as they are, anchor Jesus firmly in history.

What Jesus taught is enormously significant both to believers and to historians, though the task of reconstructing his teaching is one of the most contested enterprises in all of New Testament scholarship. Scholars have proposed various models: Jesus as apocalyptic prophet, announcing the imminent arrival of God's kingdom; Jesus as wisdom teacher, offering a countercultural ethic of love, forgiveness, and solidarity with the poor; Jesus as social reformer, challenging the purity codes and social hierarchies of his day; Jesus as a figure difficult to reduce to any single category. The gospels themselves — the four accounts of his life and teaching eventually included in the Christian scriptures — present him proclaiming what he called the Kingdom of God, or in Matthew's gospel the Kingdom of Heaven: a transformed order in which the last would be first, the poor would be blessed, enemies would be loved, and God's will would be done on earth as it is in heaven. He healed the sick, ate with social outcasts, debated with religious authorities, and gathered around him a close circle of disciples, twelve of whom hold particular significance in Christian tradition, mirroring the twelve tribes of Israel.

His entry into Jerusalem shortly before the festival of Passover, his disruption of commercial activity in the Temple precincts, and his gathering following brought him into fatal conflict with both the Temple establishment and the Roman occupiers. He was arrested, tried in proceedings whose exact nature is itself a matter of scholarly debate, and executed by crucifixion — a form of death the Romans reserved for slaves, criminals, and political troublemakers. For his followers, that death was catastrophic. The one they had believed was the Messiah — the anointed liberator whom Jewish tradition expected — was dead.

And then something happened that would change the world.

According to the earliest Christian sources, and according to the faith of Christians across all traditions and centuries, Jesus rose from the dead. The apostle Paul, writing in what scholars identify as the earliest surviving Christian text — his first letter to the Corinthians, composed perhaps in the early 50s of the Common Era, only two decades after the crucifixion — passes on a formula he says he himself received, which lists appearances of the risen Jesus to Peter, to the twelve disciples, to more than five hundred people at one time, to James, and finally to Paul himself. The four gospels, written between roughly 70 and 100 of the Common Era according to most scholarly dating, describe the discovery of an empty tomb and multiple appearances of the risen Jesus. Precisely what happened — whether the resurrection was a bodily historical event, a spiritual experience, a visionary encounter, or something that defies the available categories — is perhaps the single most theologically charged and debated question in all of biblical scholarship. For Christians, the Resurrection is not a metaphor. It is the central fact of history, the event upon which everything else turns. Scholars who work within naturalistic historical frameworks note the difficulty of adjudicating such a claim by historical methods alone, and the conversation has continued for centuries.

What is not in historical dispute is the consequence. The followers of Jesus, who had scattered in fear after his arrest, regathered with extraordinary conviction and began proclaiming publicly, in Jerusalem and beyond, that God had raised Jesus from the dead. They understood this as the vindication of Jesus, the confirmation that he was indeed the Messiah, and more — the beginning of the new age that the Jewish prophets had anticipated. They began baptizing new members, sharing meals together, and forming communities. They were, at first, entirely Jewish — a movement within Judaism, not a separate religion. They continued to worship in the Temple and the synagogues. They observed the Torah. They understood themselves as the fulfillment of Israel's story, not its replacement.

The figure who most dramatically shaped the early expansion of Christianity was a man named Saul of Tarsus, who appears in the New Testament as a zealous persecutor of the early Jesus movement before experiencing what he describes as a dramatic encounter with the risen Christ on the road to Damascus. Renamed Paul, he became the movement's most energetic missionary, traveling across the eastern Mediterranean world — through Asia Minor, Macedonia, Greece, and eventually to Rome itself — establishing communities of believers in major cities, writing letters to those communities that would become foundational Christian scripture, and advancing a profound theological interpretation of Jesus's death and resurrection. Paul argued that in Jesus, God had done something of universal significance — not only for Jews but for Gentiles, for all of humanity. This universalizing impulse was one of the most transformative developments in religious history.

The inclusion of Gentiles — non-Jews — into the community without requiring circumcision or full Torah observance was itself deeply controversial and generated fierce debate in the early movement. The council described in the fifteenth chapter of the Acts of the Apostles represents, at least as that text tells it, a major moment of negotiation. Scholars note that the early Christian world was far more diverse and contentious than later accounts sometimes suggest — a world of competing communities, competing theologies, competing claims about who Jesus was and what his life meant.

The destruction of the Jerusalem Temple by Roman forces in 70 of the Common Era was a watershed moment. It profoundly reshaped Judaism, and it accelerated the separation of the Jesus movement from the broader Jewish world. By the end of the first century, though the relationship between Christianity and Judaism remained complex and varied across different communities and geographies, what we call Christianity was increasingly a distinct movement with its own identity, its own scriptures, its own leadership structures, and its own growing membership drawn overwhelmingly from the Gentile world.

Over the next two centuries, Christianity spread across the Roman Empire despite periodic, sometimes severe, waves of persecution. Christian communities appeared in North Africa, Egypt, Syria, Mesopotamia, and Persia. The Roman emperor Constantine, who ruled in the early fourth century, issued the Edict of Milan in 313, granting religious toleration throughout the empire, and eventually embraced Christianity himself — a turning point whose long-term significance can hardly be overstated. Christianity went from a persecuted minority movement to the religion of empire within a single lifetime. By the end of the fourth century, under the emperor Theodosius, it had become the official religion of the Roman state.

This imperial embrace brought both tremendous expansion and tremendous theological controversy. Questions about the precise nature of Jesus — his relationship to God, his human and divine dimensions — generated intense debate. The Council of Nicaea in 325, convened by Constantine himself, produced what became the Nicene Creed, a statement of faith affirming that Jesus was of the same substance as God the Father, fully divine and not merely a created being. This contra-Arian settlement — rejecting the position associated with a Alexandrian priest named Arius, who had argued that the Son was in some sense subordinate and created — was enormously consequential, though Arianism remained a force in parts of the Christian world for centuries. Subsequent councils refined Christian understanding of the Trinity and of Christ's dual nature — fully human and fully divine — producing formulations that remain normative for most of global Christianity to this day.

Now let us turn to what Christians actually believe — as adherents themselves describe it — because understanding the faith from the inside is essential to understanding the tradition.

At the heart of Christian belief is the doctrine of the Trinity: the conviction that the one God exists eternally in three persons — Father, Son, and Holy Spirit — distinct but not separate, one in substance and will. Christians are careful to say this is not a belief in three gods. It is a belief in one God whose inner life is relational, a community of love. Most Christians would say this doctrine is not self-evident from ordinary human reasoning — it is revealed truth, disclosed through scripture and the experience of the early church as it tried to make sense of Jesus and of the Spirit it experienced moving among believers. The Trinity is not explicitly spelled out as a formula in the New Testament, but Christians hold that the full scriptural witness points in this direction, and the early councils gave it definitive theological expression.

Central to Christian belief is what theologians call the Incarnation: the conviction that in Jesus of Nazareth, the eternal Son of God took on full human flesh and nature. God became human — not partially, not in appearance only, but genuinely and completely. The Gospel of John opens with one of Christianity's most celebrated theological statements: that the Word which was in the beginning with God, and which was God, became flesh and dwelt among humanity. For Christians, the Incarnation means that God knows human experience from the inside — hunger, weariness, grief, temptation, and ultimately death. It is a claim that elevates human existence and matter itself, suggesting that the physical world is not something to be escaped but something capable of bearing the divine.

Then there is the Atonement — the theological account of what Jesus's death accomplished. Why did the Son of God have to die? Christians have answered this question in multiple ways across the centuries, and it is worth noting that no single theory of atonement has ever been defined as official dogma in quite the way the Trinity has been. One influential family of theories, often associated with the medieval theologian Anselm of Canterbury and later developed by the Protestant Reformers, holds that human sin created an infinite debt or offense against God's honor and justice, which only a being who was both fully human and fully divine could satisfy — the so-called substitutionary or satisfaction theory. Another approach, sometimes called the moral influence or exemplarist theory and associated with the twelfth-century thinker Peter Abelard, holds that Christ's death is primarily a supreme demonstration of God's love, moving human hearts to repentance and transformation. Christus Victor — an older framework given renewed attention in the twentieth century — sees the death and resurrection of Jesus as a cosmic battle in which Christ defeats the powers of sin, death, and the devil, liberating humanity from their grip. Eastern Orthodox theology has generally emphasized what it calls theosis or deification — the process by which human beings are transformed and participate in the divine nature — as the overarching framework for understanding salvation. The diversity of atonement theologies within Christianity is itself a reminder of the tradition's enormous internal richness.

The Resurrection, as we have noted, is not peripheral to Christianity — it is its core. Paul writes famously that if Christ has not been raised, Christian faith is futile. Christians hold that the risen Jesus is not a memory or an inspiration but a living presence — that death could not hold him, that God's power over death has been revealed, and that this same power holds the promise of eternal life for all who trust in Christ. The hope of resurrection — of bodily life beyond death in a transformed creation — is the horizon against which Christian life is lived.

The sacred texts of Christianity are gathered in what Christians call the Bible, which consists of two main sections: the Old Testament and the New Testament. The Old Testament — which corresponds largely to the Hebrew scriptures, the Tanakh of Jewish tradition — is understood by Christians as scripture that finds its fulfillment in Christ, though the precise relationship between the two Testaments has been debated throughout Christian history, and different Christian traditions include somewhat different books in their Old Testament canons. The New Testament consists of twenty-seven books: four gospels (Matthew, Mark, Luke, and John), the Acts of the Apostles, twenty-one epistles or letters (the majority attributed to Paul), and the book of Revelation. The process by which these particular books came to be recognized as authoritative — what scholars call canonization — was gradual, extending across the second, third, and fourth centuries, with broad consensus emerging by the late fourth century, though formal canonical lists continued to be refined.

Christians understand the Bible in a variety of ways. Many hold that it is divinely inspired — that God worked through human authors to produce scripture that carries divine authority. Traditions differ, however, on what inspiration means: some hold to a view of verbal inerrancy, asserting that the original manuscripts were without error in all they affirm; others speak of inspiration in terms of the Bible's reliability for matters of faith and salvation while acknowledging human elements in its composition; still others read scripture through a more explicitly literary and historical lens while still regarding it as the church's authoritative witness to God's action in Jesus. These differences in hermeneutics — in approaches to interpreting scripture — map significantly onto the diversity of Christian traditions.

How do Christians actually practice their faith? At the center of Christian communal life is worship — gathering together, typically on Sunday, in memory of the day of resurrection. The forms worship takes vary enormously across traditions, but certain elements appear with remarkable consistency. Prayer is universal — addressing God directly, with thanksgiving, confession, petition, and praise. Scripture reading and preaching or teaching occupy a central place. Music, in its infinite variety, has been one of Christianity's great gifts to the world's cultural heritage, from Gregorian chant and Bach's cantatas to African-American spirituals and contemporary praise songs.

Most Christian traditions observe certain sacred rites that the early church established and that many call sacraments — actions that are believed to convey or symbolize divine grace. Baptism, the rite of initiation by water in the name of the Trinity, is nearly universal in Christianity, though traditions differ significantly on whether infants should be baptized (as in Catholic, Orthodox, and most mainline Protestant traditions) or whether baptism should await a conscious personal profession of faith (as in Baptist, Anabaptist, and many evangelical traditions). The Eucharist — also called the Lord's Supper, Holy Communion, or the Mass — is the shared meal of bread and wine or bread and grape juice that Jesus instituted at his last supper with his disciples. Christians hold that in this meal they are in some sense united with Christ and with one another, though they differ profoundly on the nature of Christ's presence. Roman Catholics hold the doctrine of transubstantiation — that the substance of the bread and wine truly becomes the body and blood of Christ while the outward appearances remain. Eastern Orthodox speak of a real presence while generally declining to specify its metaphysical mechanics. Lutheran theology has historically affirmed a real presence in, with, and under the bread and wine. Reformed and many other Protestant traditions understand the Supper as a memorial and a symbolic participation, a spiritual nourishing through faith.

Beyond baptism and Eucharist, Roman Catholic and Orthodox traditions recognize additional sacraments: confirmation, confession and absolution, anointing of the sick, marriage, and holy orders. Protestant traditions vary in how they treat these rites, some affirming similar practices without necessarily using the language of sacrament.

Christian life, beyond formal worship, encompasses prayer both communal and personal, ethical conduct shaped by the teachings of Jesus and the broader biblical witness, care for the poor and vulnerable, and participation in family and community. Practices of fasting, pilgrimage, veneration of saints, and contemplative prayer appear prominently in Catholic and Orthodox life. Many Protestant traditions emphasize personal Bible reading, small-group fellowship, and what they call a personal relationship with Christ. Service to the neighbor — what Christians often call the call to justice and mercy — has motivated extraordinary acts of charity, social reform, and also, it must be honestly acknowledged, has at times been entangled with power, colonialism, and harm.

The lived diversity of Christianity across the globe today is staggering, and any account of Christian practice must hold official ideal and actual variety in tension. The vibrant Catholicism of a small village in southern Mexico, with its blending of indigenous imagery and Catholic devotion; the austere simplicity of a Quaker meeting in Pennsylvania; the thunderous gospel choir of a Baptist congregation in Atlanta; the incense and Byzantine chant of an Orthodox Divine Liturgy in Greece; the all-night prayer vigils of Pentecostal believers in Lagos or Seoul — these are all Christianity, and the tradition they share, while recognizable, is lived through profoundly different cultural, liturgical, and theological lenses.

Which brings us to the internal diversity of the tradition itself. Christianity has never been monolithic. From its earliest days it has contained disputes, competing interpretations, and schisms. But for our purposes, three great families of Christianity merit particular attention: Eastern Orthodoxy, Roman Catholicism, and Protestantism — with Pentecostalism and other renewal movements deserving special mention as a transformative force within and alongside the Protestant world.

The Great Schism of 1054 formalized a division that had been growing for centuries between the Latin-speaking Christianity of Rome and the Greek-speaking Christianity of Constantinople and the Eastern Mediterranean. The Eastern Orthodox family of churches — which includes the Greek Orthodox, Russian Orthodox, Serbian Orthodox, Romanian Orthodox, Coptic Orthodox, Ethiopian Orthodox, and others — understands itself as the continuous preservation of the faith of the undivided early church. Orthodox Christianity is characterized by an extraordinarily rich liturgical tradition, a theology that emphasizes divine mystery and the limits of human language about God (what theologians call apophatic theology), a deep veneration of icons as windows into the divine, and a model of church governance structured around autocephalous — self-governing — national or regional churches in communion with one another under the honorary primacy of the Ecumenical Patriarch of Constantinople. Orthodoxy understands salvation primarily through the lens of theosis — the ongoing transformation and divinization of the human person, beginning in this life and perfected in eternity. The Orthodox calendar is rich with feast days, fasting seasons, and commemorations of saints, and the Divine Liturgy — the main Eucharistic service — is experienced by Orthodox believers as a participation in heavenly worship, outside of time.

Roman Catholicism, with approximately 1.3 billion members, is the largest single Christian communion. It understands itself as the church founded on Peter, to whom Jesus is recorded in Matthew's gospel as entrusting a unique authority, and traces an unbroken succession of bishops of Rome — popes — from Peter forward. The Pope holds what Catholic doctrine describes as universal jurisdiction and, under specific conditions, infallibility in matters of faith and morals — a doctrine defined formally at the First Vatican Council in 1870 but understood by Catholics as continuous with ancient teaching. Catholic theology and practice are shaped by scripture and tradition together — the teaching authority of the church, what Catholics call the Magisterium, playing an authoritative interpretive role. Catholic life is deeply sacramental, structured by the Mass, the seven sacraments, the liturgical year, devotion to Mary the Mother of God (called Theotokos — God-bearer — in both Catholic and Orthodox traditions), and a rich tradition of religious orders from the Benedictines to the Franciscans to the Jesuits. The Second Vatican Council, held from 1962 to 1965, was a landmark moment of renewal and reform — updating the church's engagement with the modern world, reforming the liturgy (including the introduction of Mass in vernacular languages rather than Latin), and opening new dialogues with other Christian traditions and with the world's religions.

Protestantism encompasses the vast array of Christian traditions that emerged from the sixteenth-century Reformation — a movement of reform initiated in Western Europe in response to what reformers saw as theological error and institutional corruption within the medieval Catholic Church. The German Augustinian friar Martin Luther, who in 1517 posted his famous Ninety-Five Theses protesting the sale of indulgences, became a catalyst for a rupture that would reshape Western Christianity permanently. Luther's core theological convictions — that salvation is by grace through faith alone, not through works or church mediation; that scripture alone is the supreme authority for Christian doctrine; and that every believer stands before God without need of a priestly intermediary — became organizing principles of the Lutheran tradition and, in various forms, of Protestantism broadly. The Swiss reformer John Calvin developed a related but distinct theological system emphasizing the absolute sovereignty of God, predestination, and the gathered community of saints. The English Reformation produced the Church of England — the Anglican tradition — which occupies a distinctive position as a via media, or middle way, preserving much of Catholic liturgy and episcopal structure while embracing Protestant theology. The radical reformers — Anabaptists in Zurich, Mennonites, and their descendants — pushed further still, rejecting infant baptism, advocating the separation of church and state, and embracing a radical discipleship ethic.

Over the following centuries, Protestantism splintered and proliferated in extraordinary ways: Baptists, Methodists, Presbyterians, Congregationalists, Quakers, Adventists, and hundreds of other denominations and independent movements. What unites them — very broadly — is the Reformation emphasis on scriptural authority and salvation by grace through faith, though the particular expressions of these convictions differ enormously. Some Protestant traditions are liturgically rich and theologically precise; others are informal, experiential, and suspicious of creeds and ritual.

Among the most dramatic developments in twentieth-century Christianity is the rise of Pentecostalism. Often traced to a revival at Azusa Street in Los Angeles in 1906, Pentecostalism emphasizes the immediate, experiential work of the Holy Spirit — including speaking in tongues (what the New Testament calls glossolalia), healing, prophecy, and other gifts associated with the day of Pentecost described in the Acts of the Apostles. From its beginnings in a racially integrated revival meeting in early twentieth-century America — itself a remarkable fact given the period — Pentecostalism has grown explosively across the global South. Today, hundreds of millions of Christians identify as Pentecostal or charismatic, with enormous concentrations in sub-Saharan Africa, Latin America, and East and Southeast Asia. Scholars of religion have described this as one of the most rapid expansions of a religious movement in recorded history. Pentecostalism has also permeated other Christian traditions in the form of the charismatic renewal movement, introducing practices of spontaneous worship, healing prayer, and spiritual gifts into Catholic, Orthodox, and mainline Protestant communities.

The contemporary landscape of Christianity raises questions that are, by any measure, urgent and unresolved.

One is the geographic and demographic shift in the global church's center of gravity. For centuries, Christianity was associated primarily with Europe and, by extension, with European colonial expansion. Today, the growth of Christianity in the Global North has stalled or reversed in many places, while it has expanded dramatically in sub-Saharan Africa, Latin America, East Asia, and parts of Oceania. The sociologist Philip Jenkins famously described this shift as the rise of the Global South church — a church that is younger, more charismatic in its worship style, more theologically conservative in many respects, and shaped by cultural contexts radically different from those that have dominated Christian theology and institution for a millennium. The implications for Christian unity and theology are still unfolding.

A second set of contemporary questions concerns gender, sexuality, and family. These questions cut across virtually every Christian tradition and community, often generating intense conflict. Debates about the ordination of women to priestly or pastoral ministry, about same-sex marriage and the inclusion of LGBTQ Christians, about sexual ethics and reproductive rights — these are live and often painful in Christian communities worldwide. Positions range across a very wide spectrum: some traditions have fully embraced the ordination of women and the blessing of same-sex unions; others hold that such developments represent a departure from scriptural teaching; and many communities contain significant internal diversity of view. These debates have fractured denominations — most notably Anglican and Methodist communions have experienced painful divisions in recent years — and show no signs of simple resolution.

A third issue is Christianity's relationship to its own historical legacy, including the history of colonialism, the Crusades, the Inquisition, anti-Semitism, and the participation of many Christian institutions in the transatlantic slave trade. Many Christian communities have engaged in formal processes of repentance and lament — acknowledging harm done in the name of the cross and seeking repair. Others contest historical interpretations or emphasize the simultaneous history of Christian social reform and humanitarian action. The conversation about this history is necessarily complex and ongoing.

A fourth concern is the relationship between Christianity and secularization — particularly in Western Europe and North America, where religious affiliation has declined significantly in recent decades. The rise of the category of the religiously unaffiliated — those who describe themselves as spiritual but not religious, or as having no religious identity — represents a significant cultural shift. Churches have responded in a variety of ways: some by emphasizing traditional identity and doctrine, others by pursuing liturgical renewal and fresh forms of community, others by focusing on social engagement and justice. The relationship between institutional Christianity and the broader culture is being renegotiated in real time.

A fifth issue, and one that will only grow in significance, is Christianity's engagement with ecological crisis. Drawing on the Genesis creation narratives and on the biblical vision of human beings as stewards of creation, as well as the Incarnation's affirmation of the material world, many Christian theologians and communities have developed what is sometimes called eco-theology — a framework for understanding care for the earth as a dimension of faithful Christian living. Pope Francis's encyclical Laudato Si, issued in 2015 and addressed not only to Catholics but to all people, made a major intervention in this conversation, linking ecological destruction with economic injustice and calling for an integral ecology rooted in Christian faith.

How do scholars study Christianity? The academic study of Christianity is pursued across several disciplines that bring different tools and ask different questions. Historians of early Christianity work with a remarkably rich and also frustratingly incomplete set of sources — New Testament texts, early Christian writings from figures like Ignatius of Antioch, Justin Martyr, and Origen, the accounts of church councils, and the increasingly important evidence of archaeology. They debate questions of authorship, dating, and the social history of early Christian communities, working with methods from literary criticism, social-scientific analysis, and material culture. New Testament scholars employ tools like form criticism, redaction criticism, and historical-critical analysis to examine the gospels and epistles — asking how these texts were composed, what sources they drew on, how they functioned in early communities. These methods have generated vast and fascinating scholarship, some of it deeply challenging to traditional Christian claims, much of it enriching understanding even for committed believers.

Theologians — working within the tradition, usually with confessional commitments — engage scripture, the creeds, and the great theologians of the tradition in constructive and systematic work, seeking to articulate the faith coherently for their own time. Historical theologians trace the development of doctrine across the centuries, showing how the tradition has always been dynamic and contested rather than static. Sociologists and anthropologists study Christian communities as lived social phenomena — examining how Christianity shapes and is shaped by culture, power, gender, and ethnicity. Scholars of global Christianity examine the extraordinary variety of Christian expression across the world's cultures, showing that Christianity is not a single thing but a family of related traditions in ongoing conversation and sometimes conflict with one another.

One particularly important conversation in the scholarly study of Christianity concerns the relationship between the historical Jesus and the Christ of faith — between the figure who can be reconstructed through historical methods and the divine figure proclaimed in Christian preaching and theology. The so-called quest for the historical Jesus has occupied scholars since the eighteenth century and continues today. Figures like Albert Schweitzer, who argued that Jesus was above all an apocalyptic prophet expecting an imminent end, Rudolf Bultmann, who was skeptical about how much history could be recovered from the gospels and focused on the theological significance of the proclamation, and more recent scholars like E.P. Sanders, John Meier, and N.T. Wright have offered widely differing reconstructions and interpretations. What this ongoing quest reveals is how difficult — and how important — the questions surrounding this first-century Galilean remain.

What is perhaps most striking about Christianity, when one steps back and takes in its full scope, is the combination of a single animating center — the story of Jesus of Nazareth, his death and reported resurrection, and what these events are believed to mean for God and humanity — with an almost unimaginable diversity of expression. The Byzantine mosaics of Ravenna and the mud-brick churches of rural Ethiopia. The polyphony of a Renaissance mass and the improvised singing of a Nigerian praise gathering. The mystical silence of a Carmelite monastery and the joyful noise of a Pentecostal congregation in São Paulo. The systematic theology of Thomas Aquinas and the simple spirituality of a grandmother's bedside prayer. All of these, in their different ways, reach toward the same story — of a God who, Christians believe, crossed the infinite distance to meet humanity in the flesh, suffered and died, and rose again.

Whether one believes that story, doubts it, or holds it as an open question, understanding it is essential to understanding an enormous portion of human history, culture, art, ethics, and social life. Christianity has built hospitals and waged wars. It has inspired incomparable works of art and justified indefensible acts of violence. It has liberated and it has oppressed. It has been one of the great forces of human civilization, for good and for ill, and it continues to be shaped and reshaped by the more than two billion people who claim it as their own — in cathedrals and house churches, in monasteries and megachurches, in ancient liturgies and experimental gatherings, on every continent of the earth.

Thank you for listening to Intellegix World Religions. This has been an introduction to Christianity — its origins in the world of Second Temple Judaism, the life and teaching and reported resurrection of Jesus of Nazareth, the formation of the early church and the Christian scriptures, the great theological convictions of Trinity, Incarnation, Atonement, and Resurrection, the richness and diversity of Christian practice from Orthodox liturgy to Pentecostal worship, the major branches of the tradition, and the contemporary questions Christianity is living with today. We hope this has left you more curious, more informed, and with a deeper appreciation for the complexity and humanity of this remarkable tradition. Until next time, from all of us at Intellegix, thank you for being curious about the world.