In "The Source" by James A. Michener, a character argues that Judaism had its time, suggesting that Jews should have embraced Christianity when it emerged. He believes that Christianity has now had its moment and implies the intelligent choice would be to convert to Islam, which he claims is the future of religion. This perspective reflects a belief in the inevitability of religious evolution and the idea that following the current dominant faith is a sign of wisdom.

The character boldly predicts a future in which Islam will dominate not only Africa and Black America but also influence countries traditionally holding onto Hinduism and Buddhism, like India, Burma, and Thailand. He positions Islam as the ultimate source of salvation in this changing religious landscape, emphasizing the idea of progression in faith and the importance of aligning with what he sees as the next significant religious movement.