Liberal politicians, abetted by the mainstream media, regularly document the alleged shortcomings of free-market capitalism. Politicians like Sen. Bernie Sanders and Rep. Alexandria Ocasio-Cortez point to rising inequality and a supposed lack of upward mobility to make the case for socialism. Today, American Democrats have a more positive view of socialism than capitalism, and less than half of young adults have a positive view of capitalism. But the debate isn’t merely between left-wing socialists and right-wing capitalists. Even President Trump argues that capitalism generates prosperity abroad at the expense of American...