Several estimates are now in circulation, and Robert Samuels’s 2013 book Why Public Higher Education Should Be Free presents the most detailed proposal. According to the most-recent calculations of Strike Debt, the debt-resistance group I work with, the cost would be relatively modest. The federal loan program is propped up by a motley assortment of subsidies and tax exemptions that amount to tens of billions of dollars. Strip these away, along with some other unjustifiable subsidies (GI Bill benefits and Pell Grants that are gobbled up by fraudulent for-profit colleges) and the cost to the government of public college would be as low as $15 billion in additional annual spending. That is little more than a line item in the defense budget, and a small price to pay for meeting the challenge of the 21st-century knowledge economy.