Tanya Marie Luhrmann is an American psychological anthropologist known for her studies of modern-day witches, charismatic Christians, and studies of how culture shapes psychotic, dissociative, and related experiences. She is the author of How God Becomes Real, which asks what it means to say that a person 'believes' in gods, how and why this kind of belief is so different from mundane beliefs about the normal world, and how these gods become vividly real to some people. Find Within Reason on YouTube.