Progressivism: conservation. Leonard wrote that Grant also opposed war, had doubts about imperialism, and supported birth control. Grant became a part of popular culture in 1920s America, especially in New York. Grant's conservationism and fascination with zoological natural history made him influential among the New York elite, who agreed with his cause, most notably Theodore Roosevelt. Author F. Scott Fitzgerald featured a reference to Grant in The Great Gatsby. Tom Buchanan, a fatuous Long Island aristocrat married to Daisy, was reading a book called The Rise of the Colored Empires by "this man Goddard", blending Grant's Passing of the Great Race and his colleague Lothrop Stoddard's The Rising Tide of Color Against White World Supremacy. Grant left no offspring when he died in 1937 of nephritis. Several hundred people attended Grant's funeral, and he was buried in Sleepy Hollow Cemetery in Tarrytown, New York. He left a bequest of $25,000 to the New York Zoological Society to create "The Grant Endowment Fund for the Protection of Wild Life", $5,000 to the American Museum of Natural History, and another $5,000 to the Boone and Crockett Club. Relatives destroyed his personal papers and correspondence after his death. At the postwar Nuremberg Trials, three pages of excerpts from Grant's Passing of the Great Race were introduced into evidence by the defense of Karl Brandt, Hitler's personal physician and head of the Nazi euthanasia program, in order to justify the population policies of the Third Reich, or at least indicate that they were not ideologically unique to Nazi Germany. Grant's works of "scientific racism" have been cited to demonstrate that many of the genocidal and eugenic ideas associated with the Third Reich did not arise specifically in Germany, and in fact that many of them had origins in other countries, including the United States. As such, because of Grant's well-connected and influential friends, he is often used to illustrate the strain of race-based eugenic thinking in the United States, which had some influence until the Second World War. Because of the use made of Grant's eugenics work by the policy-makers of Nazi Germany, his work as a conservationist has been somewhat ignored and obscured, as many organizations with which he was once associated (such as the Sierra Club) wanted to minimize their association with him. His racial theories, which were popularized in the 1920s, are today seen as discredited. The work of Franz Boas