Then what did he do?")[1][2] and established no school, but was revered for his extraordinary intelligence and moral seriousness. He was a famously influential teacher; his former students included Hilary Putnam,[3] Jerry Fodor, Raymond Geuss, Alvin Goldman, Daniel M. Hausman, Robert Nozick, and Gideon Rosen. In 1967, Morgenbesser signed a letter declaring his intention to refuse to pay taxes in protest against the U.S. war in Vietnam, and urging other people to also take this stand.[16]