Joe Green is a social entrepreneur who has spent his career addressing significant challenges by marrying technology with community organizing. Joe is a co-founder and President of the Psychedelic Science Funders Collaborative, a donor network that supports research and clinical trials of physician-prescribed psychedelic medicines. He also co-founded Treehouse, an organization that builds communal housing apartment buildings in Los Angeles. Joe is a co-chair for Or Halev, and co-founded NationBuilder, Causes, and FWD.us. He has also supported MAPS and the Usona Institute.