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Self-interest generally refers to a focus on the needs or desires (''interests'') of the self. A number of philosophical, psychological, and economic theories examine the role of self-interest in motivating human action. ==In philosophy== Philosophical concepts concerned with self-interest include: *Enlightened self-interest, a philosophy which states that acting to further the interests of others also serves one's own self-interest. *Ethical egoism, the ethical position that moral agents ''ought'' to do what is in their own self-interest. *Hedonism, the school of ethics which argues that pleasure is the only intrinsic good. * *Epicureanism, a philosophical system related to hedonism. *Individualism, a philosophy stressing the worth of individual selves. *Rational egoism, the position that all rational actions are those done in one's self-interest. ==In psychology== Psychological concepts concerned with self-interest include psychological egoism, the view that humans are always motivated by self-interest, and narcissism, which is an unhealthy self-absorption due to a disturbance in the sense of self. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Self-interest」の詳細全文を読む スポンサード リンク
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