Robert Green Ingersoll (August 11, 1833 – July 21, 1899) was an American lawyer, writer, and orator during the Golden Age of Free Thought, who campaigned in defense of agnosticism. He was nicknamed "The Great Agnostic
https://en.wikipedia.org/wiki/Robert_G._IngersollAn inherent champion of freethought, Ingersoll was undoubtedly a true freedom fighter in not just on the matter of religion, also being a staunch supporter of causes as abolition of slavery and woman suffrage. Fighting against the repressive nature of religion is one worthy goal, he also became a progressive champion in the Republican Party, back when they allowed sane people to be members of the party. Underrated figure in the history of America.