Dr. Paul Andrews is an Associate Professor of Evolutionary Psychology in the Department of Psychology, Neuroscience and Behaviour at McMaster University. His research focuses on understanding the evolution of depression, which he argues may be an evolved emotional response for understanding and solving complex problems. Dr. Andrews is also concerned with the evolution of the serotonin system and the effects of antidepressants on mental and physical health. His research has shown an increased risk of cardiovascular events, as well as death among those who use antidepressants.