High levels of social media use are being linked to delusional disorders, according to new research out of B.C. Usage is being linked to narcissism, anorexia and paranoia for example. Dr. Bernard J. Crespi, Canada Research Chair in evolutionary genetics and psychology at Simon Fraser University and co-author of I tweet, therefore I am: a systematic review on social media use and disorders of the social brain, joins Evan to talk about how high usage of social media is causing more harm than good.