Lester Grinspoon, Influential Marijuana Scholar, Dies at 92 July 7, 2020 AggregatedNews Science and Technology, Spotlight 0 Comments He believed pot was dangerous until his research convinced him otherwise. He then became a leading proponent of legalization. Dr. Lester Grinspoon, a Harvard psychiatry professor who became a leading proponent of legalizing marijuana after his research found it was… Read More→