Psychedelics have been receiving a lot of attention recently. Rather than write up another summary of psychedelic history and research, here are links to the best introductory writings we've seen so far:
The fascinating, strange medical potential of psychedelic drugs, explained in 50+ studies (a) in Vox. Giant listicle in which Vox reporters outline the potential upside and dangers of psychedelics. Pretty balanced, cautiously optimistic about the benefits.
The first part of Nichols 2016 gives a comprehensive and readable overview of recent academic research, safety considerations, and mechanisms of action (the review then veers into some pretty gnarly psychopharmacology).