karl marx? its on wikipedia
Someone who did not understand human nature, probably Karl Marx, but it could just have easily been any of those 19th century numbnuts friends of his.
Karl Marx is credited with the quote, but it was an often used slogan of the socialist movement. Supposedly the idea is traceable back to the New Testament: "All the believers were one in heart and mind. No one claimed that any of their possessions was their own, but they shared everything they had." Acts 4:32