Mental disorders and creativity are popularly considered to be related, particularly in the case of bipolar disorder and poetry, whereas Major depressive disorder appears to be significantly more common among playwrights, novelists, biographers, and artists. Although the association between bipolar disorder and creativity first appeared in literature in the 1970s, the idea of a link between "madness" and "genius" is much older, dating back at least to the time of Aristotle, and reinforced by the views of the Romanticism era.