In 1966, psychedelic drug advocate and former Harvard professor Timothy Leary appeared on the Merv Griffin Show.
"I'm in the unfortunate situation of being about 20 years ahead of my time," Leary said. When asked how many times he'd taken LSD, he answered 311. The audience gasped.
Leary was fired for experimenting with psychedelics on undergraduates, and before long, LSD was classified as a Schedule I drug, meaning it had "no known medical use." Research on the medical uses of LSD and other psychedelics came to a halt.