No work of Spanish philosopher and essayist Jose Ortega y Gasset has been more frequently cited, admired, or criticized than his defense of modernism, "The Dehumanization of Art." In the essay, originally published in Spanish in 1925, Ortega grappled philosophically with the newness of nonrepresentational art and sought to make it more understandable to a public confused by it. Many embraced the essay as a manifesto extolling the virtues of vanguard artists and promoting their efforts to abandon the realism and the romanticism of the nineteenth century.

The "dehumanization" of...