No one in this world has ever lost money by underestimating the intelligence of the great masses of the plain people. Nor has anyone ever lost public office thereby.

Mencken’s remark belongs to his long-running critique of American mass culture, boosterism, and electoral politics in the early 20th century. Writing as a journalist and cultural commentator, he frequently argued that commercial and political success in the United States often depended less on truth or excellence than on appealing to (and flattering) the presumed prejudices and credulity of large audiences. The line is typically cited in discussions of advertising, demagoguery, and popular politics, where Mencken saw a structural incentive to simplify, sensationalize, and pander—because doing so could be profitable and electorally safe.

Mencken’s point is a cynical inversion of the usual moral lesson about respecting “the people.” He suggests that in mass democracies, incentives push advertisers and politicians to appeal to the lowest common denominator: treating the public as less discerning can be profitable, and doing so rarely harms a political career. The second sentence sharpens the critique by implying that electoral success often depends on pandering rather than educating. Read as satire, the line condemns systems that reward manipulation and simplification; read more literally, it is a warning about how public opinion can be managed when institutions prize winning and selling over truth-telling.