How did paul change the way of people spread crhristianity?

Paul transformed the spread of Christianity by emphasizing the inclusion of Gentiles, thus expanding the faith beyond its Jewish roots. He traveled extensively throughout the Roman Empire, establishing churches and writing letters that articulated Christian theology and practice. His epistles became foundational texts for Christian doctrine, helping to unify diverse communities under a common belief system. Through his missionary efforts and teachings, Paul played a crucial role in making Christianity a global religion.