Positive psychology as a “movement” began in 1998 when Martin Seligman proposed, during his term as president of the American Psychological Association, that psychology be just as concerned with what is right with people as it is with what is wrong. Approximately 20–30% of people in the United States suffer from a mental disorder at one time or another, and that slice of the population has received much attention in the psychology literature for many decades. Positive psychology sprang from a desire to rebalance psychology as a field so that, in addition to understanding the etiology and optimal treatment strategies for mental disorders, it would be possible to understand and better the lives of the other 70–80% of people who are not severely distressed.