Both the American left and right often use “national security” to justify sweeping proposals for new U.S. protectionism and industrial policy. “Free markets” and a lack of government support for the manufacturing sector are alleged to have crippled the U.S. defense industrial base’s ability to supply “essential” goods during war or other emergencies, thus imperiling national security and demanding a fundamental rethink of U.S. trade and manufacturing policy. The COVID-19 crisis and U.S.-China tensions have amplified these claims.This resurgent “security nationalism,” however, extends far beyond the limited theoretical scenarios in which national security might justify government action, and it suffers from several flaws.First, reports of the demise of the U.S. manufacturing sector are exaggerated. Although U.S. manufacturing sector employment and share of national economic output (gross domestic product) have declined, these data are mostly irrelevant to national security and reflect macroeconomic trends affecting many other countries. By contrast, the most relevant data—on the U.S. manufacturing sector’s output, exports, financial performance, and investment—show that the nation’s total productive capacity and most of the industries typically associated with “national security” are still expanding.Second, “security nationalism” assumes a need for broad and novel U.S. government interventions while ignoring the targeted federal policies intended to support the defense industrial base. In fact, many U.S. laws already authorize the federal government to support or protect discrete U.S. industries on national security grounds.Third, several of these laws and policies provide a cautionary tale regarding the inefficacy of certain core “security nationalist” priorities. Case studies of past government support for steel, shipbuilding, semiconductors, and machine tools show that security‐related protectionism and industrial policy in the United States often undermines national security.Fourth, although the United States is not nearly as open (and thus allegedly “vulnerable”) to external shocks as claimed, global integration and trade openness often bolster U.S. national security by encouraging peace among trading nations or mitigating the impact of domestic shocks.Together, these points rebut the most common claims in support of “security nationalism” and show why skepticism of such initiatives is necessary when national security is involved. They also reveal market‐oriented trade, immigration, tax, and regulatory policies that would generally benefit the U.S. economy while also supporting the defense industrial base and national security
