LSD was first discovered in 1938. It is made up of lysergic acid, and it is one of the most potent psychedelic drugs there are. The effects of the drug may vary from person to person, but overall shift in sensations is the most common reactions amongst users.
By 1951, both scientists and the government were experimenting with psychedelic drugs on human volunteers. By 1963, there was a shift in the drug's use, and people were taking it outside of the laboratory, for personal use. It gave them feelings they had never experienced before, and expanded their minds.