Answer:
Utilitarianism
Step-by-step explanation:
"Utilitarianism" is a principle that is under the study of Ethics. According to this principle, an action is deemed good if it results to the good of all (or the most good). "The good of all" here means, one's own good and the good of other people.
In this principle, an action will only be considered good according to the consequences it produces. Important classical utilitarians are Jeremy Bentham and John Stuart Mill.
According to Bentham, happiness can be derived from one's happy experience, without pain. Mill's theory on utilitarianism is that, when an action produces happiness, then it is at the right proportion; on the contrary, when it produces pain, then it is not at the right proportion.
Thus, the answer is "utilitarianism."