What role did timothy leary play in the counterculture movement?

Dr. Timothy Leary pushed forward the counter-culture values of spiritual and chemical mind expansion. He began experiments on LSD at Harvard and experimented on students who professed great mystical and spiritual growth. He also pushed forward the value of marijuana in terms of enlightenment. Eventually set upon by the government in terms of drug possession and his involvement with groups like the Weather Underground, Leary became a counterculture hero. His last Words â??Space Migration, Intelligence Increase and Life Expansion were his predictions for the future.