Auschwitz survivor Primo Levi, born on this day 100 years ago, feared that no one would believe what he had seen. The Italian Jewish chemist took to writing nevertheless, to describe his worst nightmare. Released initially in only 1,400 copies, Levi's autobiographical book, If This Is a Man, is today regarded as one of the most important pieces of literature documenting Nazi atrocities. | World Jewish Congress

Primo Levi, born on July 31, 1919, feared that no one would believe the horrors he had seen at Auschwitz. His autobiographical book, "If This Is a Man," was one of the first published accounts of the Holocaust, and is considered one of the most important pieces of literature about the Nazis' atrocities. Now more than ever, it is critical that we recognize the signs of extremism and hatred today. Visit www.AboutHolocaust.org to know more. | World Jewish Congress