『The Fifth Risk』要約

In The Fifth Risk, Michael Lewis examines how the Trump administration’s transition and early governance neglected the quiet, technical work of the federal government. Lewis frames the book around what he calls the “fifth risk”: the danger that the public simply does not know what the government does, and therefore cannot see what is lost when competent civil servants are ignored, sidelined, or replaced. The title refers to a risk category beyond the standard four—market, credit, operational, and legal—that a former government official describes to Lewis. The book is structured around three federal departments: Energy, Agriculture, and Commerce. Its protagonists are career civil servants and Obama-era appointees who stayed to brief incoming officials, only to find many of them uninterested or absent. Lewis profiles figures such as John MacWilliams, a former Energy Department official who explains the department’s largely hidden responsibilities, including nuclear weapons stewardship, nuclear nonproliferation, and cleanup of Cold War waste. He also explores the National Nuclear Security Administration, the loan programs that backed Tesla and Solyndra, and the department’s work on climate and energy research. In the Agriculture section, Lewis highlights the department’s extensive reach into food safety, rural development, nutrition assistance, and crop insurance, showing how little public awareness exists of its scope. The Commerce section examines the National Oceanic and Atmospheric Administration, the Census Bureau, and the Patent and Trademark Office, emphasizing how dependent the private sector is on their data. Throughout, Lewis argues that governance is not mainly about dramatic decisions but about managing risks most citizens never see. The book is a reported, character-driven account of institutional vulnerability rather than a policy manifesto.