I want to talk about the profit motive, because despite being the cornerstone of capitalism it is highly misunderstood. All sorts of proclamations about the profit motive's success as a social and economic model are published in the media daily. Other causes for social and economic conditions are often avoided, and where profit has a clear negative bias, it is generally de-emphasized.
The profit motive is a simple form of the incentive model. Incentives are conditions in a system which reward or punish different kinds of behavior. Profits refer to one subset of incentives: those which resolve in positive or negative changes to net worth. Needless to say, human incentives are more complicated than this, and strictly for-profit business models still need to account for more different changes which may not be clearly linked to positive or negative account balances. But the capitalist system tends toward this model of profit, and incentives processes are typically explained in this way as well.