A new report shows the world’s population of Holocaust survivors is aging and, unfortunately, dwindling — meaning this is the last generation of survivors able to share their stories about the Holocaust.

“We fled Poland East, and the Nazis caught up with us in Vilnius, capital of Lithuania, and I survived as a hidden child, as a Catholic,” Holocaust survivor Abraham Foxman said.

Born in Poland in 1940, Foxman spent part of his childhood in Nazi-occupied Lithuania. To save him from the Nazis, his Jewish parents gave him up to his Polish Catholic nanny, who then baptized him and raised him as a Catholic during WWII.

Foxman was reunited with his parents after the war. While they survived, many of their relatives did not. Foxman has made it his mission to tell anyone who would listen about the atrocities he witnessed.

“General Dwight Eisenhower — he almost prophetically had this sense that there will come generations who will not only not know, but will deny it, will trivialize it.” Foxman said.

Foxman, who turns 85 in May, became an American lawyer and activist, serving as the national director of the Anti-Defamation League for nearly 30 years.

The report by the Conference on Jewish Material Claims Against Germany, also known as the Claims Conference, says of the approximately 211,000 Holocaust survivors alive today, more than 1,400 are over 100 years old.

Nearly 50% of all Holocaust survivors will pass away in the next six years, 70% will pass away within a decade and, in 15 years, 90% will be gone, according to the report.

“It’s obviously very upsetting, but what it really means for the community is this is the time to get to know a survivor,” Greg Schneider, Claims Conference executive vice president, said. “To listen to their stories. To hear what it was like at the time the world was destroyed. And most importantly, what that means for today.”

While sharing their stories can be extremely difficult for Holocaust survivors, and can even re-traumatize them, Schneider said this is necessary so that the worst parts of human history are not repeated.

“Six million Jews were murdered for no reason,” Schneider said. “Absolutely no reason. They weren’t guilty of anything other than being Jewish. And if that can happen and we don’t learn those lessons, it can happen again.”

That’s why Foxman says he’ll continue to share his experience of surviving the Holocaust as long as he is able.

“Elie Wiesel, the great spokesman of the survivors, once said, ‘if you do not remember and if you forget the victims, then it’s like killing them again,’” Foxman said.