1942 — Martin E. P. Seligman was born. Seligman is well-known for his studies of learned helplessness and the relation between helplessness and depressive mood disorder. His research on preparedness emphasizes genetic constraints on learning. APA Distinguished Scientific Award for Early Career Contribution to Psychology, 1976; American Psychological Society William James Fellow, 1991; APA President, 1998.
For more on Seligman go to Martin E.P. Seligman | Positive Psychology Center or Positive Psychology & Science of Happiness - 7 Habits of Happy People
To hear the theory go to Martin Seligman: The new era of positive psychology | TED Talk | TED.com
Street, W.R. (1994) Month day in Psychology. A Chronology of Noteworthy Events in American Psychology. Retrieved August 12, 2016 from American Psychological Association Historical Database Web site at Central Washington University: http://www.cwu.edu/~warren/calmmdd.html