For too long, Jews have defined themselves in light of the bad things that have happened to them. And it is true that, many times in the course of history, they have been nearly decimated: when the First and Second Temples were destroyed, when the Jews were expelled from Spain, when Hitler proposed his Final Solution. Astoundingly, the Jewish people have survived catastrophe after catastrophe and remained a thriving and vibrant community. The question Rabbi Jonathan Sacks asks is, quite simply: How? How, in the face of such adversity, has Judaism remained and flourished, making a mark on...