“Even the best things come to an end,” wrote Thomas Sowell in late 2016, as he shut down his newspaper column in order to “spend less time following politics and more time on my photography.” Four years later, when he turned 90, the economist and Hoover Institution fellow was back with Charter Schools and Their Enemies, from Basic Books. In early 2021, Sowell writes a Townhall column on familiar subjects such as truth and the proportionality doctrine.