Early Christianity, as explored by Mark Humphries, is not merely a historical narrative but a complex examination of the origins, development, and study of Christianity from the life of Jesus Christ to the conversion of Constantine. The book aims to provide students and general readers with an orientation to the issues, methods, and sources involved in understanding early Christianity, rather than presenting a definitive history. It emphasizes the importance of studying early Christianity within the context of the classical world of Greece and Rome, acknowledging the diverse social, cultural, and religious influences that shaped its emergence.