LSD is essentially unique in that there were a group of people who actively advocated its universal use. There are several reasons for that in my knowledge, and probably others of which I am oblivious.
There were several folks who were instrumental in promoting LSD as a panacea for the troubles of the planet, or that it would make other positive changes. In at least a couple of cases, their interaction just caused the authorities to react more harshly to the wide use of the drug. We will explore some of them this evening.