Economic historian Carlo Cipolla famously noted that human beings fall into four basic categories: the martyr who takes an action and suffers a loss while producing a gain to others; the genius or prodigy who takes an action by which he/she makes a gain while yielding a gain also to society; the crook (and liar too) who takes an action by which he/she makes a gain causing others a loss; and the stupid person who causes losses to others while deriving no personal gain and even possibly incurring losses.
via Crooks, Liars, Idiots, and Plutocrats « naked capitalism.
