Martin Seligman

Martin E. P. Seligman (born August 12, 1942, in Albany, New York) is an American psychologist at the University of Pennsylvania whose career traced an arc from the study of helplessness to the study of flourishing. As a young researcher in the late 1960s he and Steven Maier identified learned helplessness — animals (and later people) who experienced uncontrollable aversive events stopped trying to escape even when escape became possible — a model that reshaped the psychology of depression.

Reckoning with that work led him to its inverse: he argued that explanatory style (how one habitually explains setbacks) is learnable, and that a more optimistic style can be trained, the thesis of his 1991 book Learned Optimism.

Elected president of the American Psychological Association, in 1998 he used the office to launch positive psychology as a research field — the rigorous scientific study of well-being, character strengths, and what makes life worth living — co-founding it with Mihaly Csikszentmihalyi.

His later work developed the PERMA model of well-being (positive emotion, engagement, relationships, meaning, accomplishment) and large interventions such as resilience training. In the Atlas he is a system-builder: he turned optimism and well-being into measurable constructs with testable interventions.

The honest caveat belongs here too — parts of positive psychology have faced replication problems and effect-size inflation, so its findings are placed on the spectrum from well-supported to provisional rather than taken wholesale.