Levels of everyday creativity were assessed from the quality and quantity of innovative accomplishments at work, at home, and in hobbies. Genes involved in manic depression may have been preserved through natural selection because they give carriers of the condition's milder form the advantage of enhanced creativity, adaptability, and work output, Richards theorizes. But he's done away with the notion that all eminent people have some form of psychopathology. Available evidence indicates that alcoholism, mild mania, and depression indeed occurred often in the mothers, fathers, and siblings of the eminent individuals in Ludwig's sample who also suffered from those conditions. But plenty of room remains for the influence of other factors on great creative feats, Ludwig asserts.
Some people just have incredible imaginations.
That doesn't mean they have a mental disorder.