17 Bohm’s intellectual exile was partly due to political events. In 1949, while Bohm was developing his theory of “action at a distance,” he was called before the House Un-American Activities committee. Because he refused to testify, he was kicked out of Princeton. With a recommendation letter from Einstein, he got a job in São Paulo. Thus Bohm was distanced from his intellectual community, but his intellectual death sentence was delivered when the U.S. State Department revoked his passport. Rendered stateless, Bohm was unable to participate in the discussions around quantum physics. He died, not exactly in obscurity (he was an Emeritus Professor at Birkbeck College, University of London), but having seen his life’s work ignored by most physicists, in 1992 (Wick, 73). His books include The Undivided Universe (London and New York: Routledge, 1993), published posthumously with Basil J. Hiley.