Egoism

thumb|250px|Narcissus (Caravaggio)|Narcissus (1597–99) by [[Caravaggio; the man in love with his own reflection]]

Egoism is a philosophy concerned with the role of the self, or , as the motivation and goal of one's own action. Different theories of egoism encompass a range of disparate ideas and can generally be categorized into descriptive or normative forms. That is, they may be interested in either describing that people do act in self-interest or prescribing that they should. Other definitions of egoism may instead emphasise action according to one's will rather than one's self-interest, and furthermore posit that this is a truer sense of egoism.

Solipsism ( ; ) is the philosophical idea that only one's mind is sure to exist. As an epistemological position, solipsism holds that knowledge of anything outside one's own mind is unsure; the external world and other minds cannot be known and might not exist outside the mind.

Objectivism is a philosophical system named and developed by Russian-American writer and philosopher Ayn Rand. She described it as "the concept of man as a heroic being, with his own happiness as the moral purpose of his life, with productive achievement as his noblest activity, and reason as his only absolute".

Egotism is defined as the drive to maintain and enhance favorable views of oneself and generally features an inflated opinion of one's personal features and importance distinguished by a person's amplified vision of one's self and self-importance. It often includes intellectual, physical, social, and other overestimations. The egotist has an overwhelming sense of the centrality of the "me" regarding their personal qualities.

ethical position that moral agents should act in their own self-interest

Selfishness is being concerned excessively or exclusively for oneself or one's own advantage, pleasure, or welfare, regardless of others. Selfishness is the opposite of altruism or selflessness, and has also been contrasted (as by C. S. Lewis) with self-centeredness.

ethical theory

The view that true altruism in humans is impossible

Maritime urban legend related to the dangers of hubris and inflexibility

thumb|upright|An appeal to self-interest during World War II Self-interest generally refers to a focus on the needs or desires (interests) of one's self. Most times, actions that display self-interest are often performed without conscious knowing. A number of philosophical, psychological, and economic theories examine the role of self-interest in motivating human action. Individuals may have a self-serving bias towards their self-interest.

Yangism () was a philosophical school founded by Yang Zhu, extant during the Warring States period (475 BCE – 221 BCE), that believed that human actions are and should be based on self-interest. The school has been described by sinologists as an early form of psychological and ethical egoism. The main focus of the Yangists was on the concept of xing (), or human nature, a term later incorporated by Mencius into Confucianism.