Gambling is known in nearly all human societies, even though many have passed laws restricting it. Early people used the knucklebones of sheep as dice. Some people develop a psychological addiction to gambling, and will risk even food and shelter to continue.
Some games of chance may also involve a certain degree of skill. This is especially true where the player or players have decisions to make based upon previous or incomplete knowledge, such as poker and blackjack. The distinction between 'chance' and 'skill' is relevant as in some countries chance games are illegal or at least regulated, where skill games are not.