On the 55th-year anniversary of the original ESPD, the McKenna Academy presents ESPD55, during these uncharted times for global mental health. This unparalleled, historic four-day online symposium hosted and carefully curated by Dennis McKenna, includes esteemed speakers like Paul Stamets, Monica Gagliano and Wade Davis. 33 of the most exciting minds in psychoactives research, present 37 sessions exploring the world of ethnopharmacologic knowledge through various life-centric themes: ethnosphere, phytosphere, mycosphere, sonosphere and beyond.