Christianity began as a movement within Judaism and became the world's largest religious tradition, spreading across every continent and splitting into thousands of distinct expressions over two millennia. At its center is the figure of Jesus of Nazareth — understood variously as the incarnate Son of God, the teacher of radical love, or the suffering servant who transforms death itself. To understand Christianity is to understand not one thing but a vast family of disagreements held together by a common name and a shared set of questions.
Each step builds on the last.