Activist and author who was called the 'Emperor of Hemp' for his efforts to decriminalize marijuana.
He first became involved in the cannabis legalization effort in the early 1970s.
He stated that hemp could be used for fuel and food in his books The Emperor Wears No Clothes and Grass.
He married his longtime partner Jeannie in 2000, and has one son.
Although he didn't receive many votes, he ran against Bill Clinton in the 1992 presidential election as a member of the Grassroots Party.