This chapter focuses on Ludwik Rajchman. Ludwik Rajchman's principal claim to fame is his role in the establishment of the United Nations International Children's Emergency Fund (Unicef). Until recently his story has gone largely untold. His contributions to Unicef, and to the World Health Organization, established by the League of Nations, however, deserve acknowledgement and further study, as do the reasons why his role in these institutions has largely been ignored. Rajchman was not a man who sought renown, and to compound this reticence, the last twenty years of his life were overshadowed by the painful contradictions of the Cold War, amongst which seems to have been the effacement of more than one interesting international figure. In addition, Rajchman's identification with three communities—the Polish, the Jewish, and the international—has meant that none has entirely ‘claimed him’ for its own.