in Indian philosophy, the influence of an individual's past actions on his future lives, or reincarnations. The doctrine of karma reflects the Hindu conviction that this life is but one in a chain of lives (saṃsāra (samsara)) and that it is determined by man's actions in a previous life. This is accepted as a law of nature, not open to further discussion. The moral energy of a particular act is preserved and fructifies automatically in the next life, where it shows up in one's class, nature, disposition, and character. The process is mechanical, and no interference by God is admitted, except by some of the later and more extreme theists. Thus the law of karma explains the inequalities that are observed among creatures.

In the course of the chain of lives, an individual can perfect himself, until he reaches the eminence of the god Brahmā himself, or he can degrade himself in such an evil way that he is reborn as an animal. Not only do past acts influence the circumstances of the next life, they also determine one's happiness or unhappiness in the hereafter between lives, where he will spend a time in either one of the heavens or one of the hells until the fruits of his karma have been all but consumed and the remainder creates a new life for him.