Final answer:
Paul's writings advanced the idea that Jesus's death was a divine plan for salvation and were key in unifying early Christians and spreading Christianity beyond Jewish communities. His epistles shaped core Christian doctrines and made the faith's message accessible to a universal audience, fostering the growth of Christianity within the Roman Empire.
Step-by-step explanation:
One of the results of Paul's writings on the life and message of Jesus was the popularization of the idea that Jesus's death and resurrection were part of a divine plan to offer salvation to humanity. Paul, after a profound personal transformation, played a pivotal role as an evangelist and spread Christianity through the Greco-Roman world. His letters, or Epistles, not only carried the message of Christianity to non-Jewish communities but also addressed theological debates and clarified teachings which were essential for the formation and spread of early Christianity. These writings influenced the Christian doctrine, especially regarding the understanding that salvation through Christ was universally available, not limited to Jews.
Moreover, Paul's mission and his epistles fostered a sense of unity among early Christians, despite the differences in their backgrounds, and helped establish foundational beliefs that shaped the Christian church's structure and practices. His work set the stage for a growing movement which, despite facing persecution from the Roman Empire, eventually flourished and became one of the major religions of the world. Paul's influence on Christianity is considered second only to Jesus himself in terms of its long-term impact on the religion's development.