Luck or chance is the philosophy that events can happen in a favorable or unfavorable manner to certain individuals. Although this belief is not widespread, traditionally some think that good luck comes to good people and bad luck comes to bad people, and that even if bad luck does occasionally surface in the life of a good person, in the end, things will be good. But this is actually not always the case, as even good people have bad luck at times.
Despite the fact that the existence of luck as a supernatural force has not been proven to exist, some people do believe in luck, and keep "good luck charms." The Martingale family kept a chunk of Green Kryptonite they called a sky stone for good luck.