Frederick Antony Ravi Kumar Zacharias was an Indian-born Canadian and American Christian evangelical minister and Christian apologist who founded Ravi Zacharias International Ministries (RZIM). He was involved in Christian apologetics for more than 40 years, authoring over 30 books. He hosted the radio programs Let My People Think and Just Thinking. Zacharias belonged to the Christian and Missionary Alliance (C&MA), the Keswickian Christian denomination in which he was ordained as a minister.

After his death, allegations of sexual harassment against him emerged, were investigated, and found to be convincing by some.