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The concept of measuring hedonic utility arose in Utilitarianism, with Classical Utilitarians acknowledging that the actual pleasure might not be easy to express quantitatively as a numeric value. Bentham, the early proponent of the concept, declared that the happiness is a sequence of episodes , each characterized by its intensity and duration.
Two-level utilitarianism is a utilitarian theory of ethics according to which a person's moral decisions should be based on a set of moral rules, except in certain rare situations where it is more appropriate to engage in a 'critical' level of moral reasoning. The theory was initially developed by R. M. Hare. [1]
In ethical philosophy, utilitarianism is a family of normative ethical theories that prescribe actions that maximize happiness and well-being for the affected individuals. [1] [2] In other words, utilitarian ideas encourage actions that lead to the greatest good for the greatest number.
A hypothetical being, which Nozick calls the utility monster, receives much more utility from each unit of a resource that it consumes than anyone else does. For instance, eating an apple might bring only one unit of pleasure to an ordinary person but could bring 100 units of pleasure to a utility monster.
Act utilitarianism is a utilitarian theory of ethics that states that a person's act is morally right if and only if it produces the best possible results in that specific situation. Classical utilitarians, including Jeremy Bentham , John Stuart Mill , and Henry Sidgwick , define happiness as pleasure and the absence of pain.
Rule utilitarianism is a form of utilitarianism that says an action is right as it conforms to a rule that leads to the greatest good, or that "the rightness or wrongness of a particular action is a function of the correctness of the rule of which it is an instance". [1]
For example: [1]: 44 Consider a problem of allocating wood among builders. The utility functions may represent their productive power – () is the number of buildings that agent can build using units of wood. The utilitarian rule then allocates the wood in a way that maximizes the number of buildings.
Preference utilitarianism (also known as preferentialism) is a form of utilitarianism in contemporary philosophy. [1] Unlike value monist forms of utilitarianism, preferentialism values actions that fulfill the most personal interests for the entire circle of people affected by said action.