A very intelligent man, Timothy Leary, served seven years in jail because he was teaching that LSD can make man in every way superior to what he is now: his consciousness can be wider, his love can be deeper, his sensitivity can touch unknown peaks which have never been touched before. In every dimension LSD can be a tremendous boost for human growth. Just because of teaching these things he was put in jail.
He was a professor, perfectly acquainted with the chemistry of LSD and the chemistry of the mind.
He was not an illiterate person; what he was saying was based on scientific discoveries. But still, because he was teaching a philosophy supporting drugs, he was imprisoned for seven years.