Photograph of Dawid Samoszul. Close-up street portrait of Dawid Samoszul, probably taken in Piotrkow Trybunalski, Poland, between 1936 and 1938. Dawid was killed in the Treblinka killing center at the age of 9. US Holocaust Memorial Museum, courtesy of Abe Samelson
The Holocaust was the systematic, state-sponsored persecution and murder of six million Jews by the Nazi regime and its allies and collaborators. Holocaust is a word of Greek origin meaning "sacrifice by fire." The Nazis, who came to power in Germany in January 1933, believed that Germans were "racially superior" and that the Jews, deemed "inferior," were an alien threat to the so-called German racial community.
During the era of the Holocaust, German authorities also targeted other groups because of their perceived racial and biological inferiority: Roma (Gypsies), people with disabilities, some of the Slavic peoples (Poles, Russians, and others), Soviet prisoners of war, and blacks. Other groups were persecuted on political, ideological, and behavioral grounds, among them Communists, Socialists, Jehovah's Witnesses, and homosexuals.