Before the United Kingdom's Dangerous Drugs Act of 1920, many of today's illicit substances, including cocaine, were readily available in British pharmacies as over-the-counter remedies, either in pure form or as an active ingredient in any number of cure-alls. During this time, Aleister Crowley ingested a variety of mind-altering drugs and wrote about his experiences in essays published in the magazine The International, where he argued for...