Utilitarianism is an ethical theory which states that the best action is the one that maximises utility. “Utility” is defined in various ways, usually in terms of the well-being of sentient entities. Jeremy Bentham, the founder of utilitarianism, described utility as the sum of all pleasure that results from an action, minus the suffering of anyone involved in the action. Utilitarianism is a version of consequentialism, which states that the consequences of any action are the only standard of right and wrong. Unlike other forms of consequentialism, such as egoism, utilitarianism considers the interests of all beings equally. (from Wikipedia).
Here’s a simple questionnaire that can assess the degree to which you subscribe to this controversial ethical theory.