Howard Zinn, born on this day in 1922, was an American historian, playwright, civil rights activist, and socialist thinker most known for his work "A People's History of the United States", originally published in 1980.

Image: Zinn at the Pathfinder Book Store, Los Angeles, August 2000 [Wikipedia]

John Maclean, born on this day in 1879, was a revolutionary Scottish socialist and schoolteacher, sometimes called "Scotland's Lenin". "I am not here as the accused; I am here as the accuser of capitalism dripping with blood from head to foot."

Image: John Maclean in December of 1918 upon his release from prison [Wikipedia]