Asia Society: Buddhism, its origins, and more
History.com: History & origins
NPR: Buddhism in our modern world
Princeton University: Buddhism primer
Harvard: Hinduism Religious Literacy Project
History.com: History & origins
Harvard University: Hinduism primer
NPR: Hindu in our modern world
History.com: History & Origins
NPR: Author describes Christianity's evolution throughout history
Bosi Center: Christianity primer
Harvard: Christianity overview
Harvard: Religious Literacy Project, Judaism
Harvard: Religious Literacy Project, Islam
Harvard: Muslim Understandings of Islam