Evolutionary psychiatry is a branch of medicine that looks at how evolution has shaped our brains and behavior. It tries to explain why we experience certain mental illnesses and how our biology has adapted to help us cope with them. By looking at our human ancestors, evolutionary psychiatrists can gain insight into how our brains have changed over time to benefit us and why some people are more prone to certain disorders than others. This type of psychiatry also looks at how culture, environment, and genetics can affect our mental health. Overall, evolutionary psychiatry is a way of understanding mental health in terms of the history of mankind.