When the Nazi party came to power in his native Germany, he began speaking out against the racist views of the party leaders (and increasingly, of the German and the American public). He wrote prolifically and lectured widely to try to educate the public on the nature of race and on the dangers of Nazi ideology. He died in 1942 with the well-founded hope that the totalitarian Nazi regime would be defeated and that a German political structure would be established on a democratic and tolerant footing.