Why Is the Loneliness Epidemic so Hard to Cure?

Finding answers to these types of questions is a notoriously difficult proposition. Loneliness is a compound or multidimensional emotion: It contains elements of sadness and anxiety, fear and heartache. The experience of it is inherently, intensely subjective, as any chronically lonely person can tell you. A clerk at a crowded grocery store can be wildly lonely, just as a wizened hermit living in a cave can weather solitude in perfect bliss. (If you want to infuriate an expert in loneliness, try confusing the word “isolation” with “loneliness.”) For convenience’ sake, most researchers still use the definition coined nearly three decades ago, in the early 1980s, by the social psychologists Daniel Perlman and Letitia Anne Peplau, who described loneliness as “a discrepancy between one’s desired and achieved levels of social relations.” Unfortunately, that definition is pretty subjective, too.