Answer: It is believed that they invented the sailboat, the chariot, the wheel, the plow, maps, and metallurgy. They developed cuneiform, the first written language. They invented games like checkers. They made cylinder seals that acted as a form of identification (used to sign legal documents like contracts.
He was a white Massachusetts abolitionist & suffragist. He & Isaac Knapp created the newspaper "The Liberator" which aided in the abolition of slavery. He later in life created The American Anti-Slavery Society.
