The memories of 20th century events inexorably fade from our collective rearview mirror, leaving us to ponder on this International Holocaust Remembrance Day: What might we still learn from the Holocaust? The question is all the more relevant and poignant because the brave Holocaust survivors on whom we have relied to be the bridge between generations, people who put a human face on the mind-numbing 6 million Jews murdered by Adolf Hitler’s “Final Solution of the Jewish Question,” are beginning to leave the world stage. Soon, their personal narratives of terror, mass murder, helplessness and irreconcilable loss during the Shoah,...