Oskar Schindler's story was not well-known after World War II (1939–1945). World War II, the largest and bloodiest conflict in history, usually overshadowed the noble efforts of determined individuals. The horrors of the Holocaust were so monstrous that the heroism of one person is easily forgotten. In fact, Schindler's deeds were not well-known until the first-rate film Schindler's List (1993) popularized them.
Nevertheless, Oskar Schindler did make a difference. He tried to do the right thing, and he risked his life and fortune. (There were some other Germans—such as those behind the 1944 Hitler assassination plot—who stood up for what they believed and risked everything.) There was nothing extraordinary about Schindler other than his salvation of more than one thousand Jews; but that was more than enough. He was an ordinary man who showed extraordinary determination.
Although Schindler could not prevent the Holocaust, he reaffirmed our faith in humanity. There may be other Oskar Schindlers whose stories are lost to history, but that does not diminish Schindler's heroism.