They Knew

In They Knew, Ethan Hayes explores twenty cases where companies had internal evidence of danger related to their products or practices but continued operating without taking action. Drawing on a variety of documents and sources, the book reveals how early warnings often went unheeded, with knowledge fragmented and signals ignored until disasters or legal actions eventually brought the issues to light. The narrative highlights patterns of decision-making under uncertainty, emphasizing that having incomplete knowledge does not equate to being unaware.