Rick Doblin is a pioneer is the field of utilizing MDMA for the treatment of post-traumatic stress disorder (PTSD). He is the founder and executive director of the Multidisciplinary Association for Psychedelic Studies (MAPS).

Tim Ferriss, the host of "The Tim Ferriss Show" podcast and the author of several best-selling books, including "The 4-Hour Workweek" and "Tribe of Mentors," has built an entire empire around offering life-hacking advice, but when someone suggested he try meditation, he resisted for a while. He tried various forms, then eventually dove head first