Bari Weiss wrote this book as a polemic rather than an academic attempt to engage in the study of the ideas behind antisemitism. Nevertheless, she read widely on the topic with a journalist’s flair for contextualizing and summarizing the material. Hers is a call to action. She directs her appeal toward American Jews, yet it will be relevant to all people who resist antisemitism. She seeks to help readers understand what they are up against, to act individually, as a community, and as members of the broader society, to counter bigotry while protecting democracy.