Marianne Deborah Williamson (born July 8, 1952) is an American author, spiritual leader, and political activist. She has written 14 books, including four New York Times number one bestsellers in the "Advice, How To, and Miscellaneous" category. The founder of Project Angel Food, a volunteer food delivery program that serves home-bound people with HIV/AIDS and life-threatening illnesses. She is also the co-founder of the Peace Alliance, a nonprofit education and advocacy organization supporting peacebuilding projects. She has frequently appeared on The Oprah Winfrey Show.