Brill takes us inside the decisions made by executives in Silicon Valley to code the algorithms embedded in their social media platforms to maximize profits by pushing divisive content. He unravels the ingenious creation of automated advertising buying systems that reward that click-baiting content and penalize reliable news publishers, and describes how the use of these ad-financed, misinformation platforms by politicians, hucksters, and conspiracy theorists deceives ordinary citizens. He documents how the most powerful adversaries of America have used American-made social media and advertising tools against us with massive disinformation campaigns-and how everything could get exponentially worse unless we act. The stakes are high for all of us, including Brill himself, whose company's role in exposing Russian disinformation operations resulted in a Russian agent targeting him and his family.