American Prophets
God sends prophets to all the nations. Plato/Socrates were probably prophets sent to Greece. God has sent America few prophets also. Here are some of them:
1) Joseph Smith (Founder of Mormonism)
2) David Koresh (Founder of Waco Religion)
3) L. Ron Hubbard (Founder of Scientology)
4) Elijah Muhammad (Founder of Nation of Islam)
Muste, Dorothy Day, Howard Thurman, Thomas Merton, Martin Luther King, Jr., and Fannie Lou Hamer—inspired individuals who succeeded in conveying their vision to the broader public through writing, speaking, demonstrating, and organizing.
If there are others, add them to the list.