Thomas Joiner is an American academic psychologist and leading expert on suicide. He is the Robert O. Lawton Professor of Psychology at Florida State University, where he operates his Laboratory for the Study of the Psychology and Neurobiology of Mood Disorders, Suicide, and Related Conditions. He is author of Why People Die by Suicide (Harvard University Press 2005) and Myths about Suicide (Harvard University Press 2010), and the current editor-in-chief of Suicide and Life Threatening Behavior. Joiner holds a Ph.D. from the University of Texas at Austin.