the kind of humanism sartre found unacceptable, according to mattey, "is one that denies the primacy of individual choice... . but there is another conception of humanism implicit in existentialism. this is one that emphasizes the ability of individual human beings to transcend their individual circumstances and act on behalf of all humans. the fact is, sartre maintains, that the only universe we have is a human universe, and the only laws of this universe are made by humans."