altruism, the selfless concern for the welfare of others

enlightened self-interest, a philosophy in ethics which states that persons who act to further the interests of others (or the interests of the group or groups to which they belong), ultimately serve their own self-interest.

Homo economicus, portrayal of humans as agents who are consistently rational, narrowly self-interested, and who pursue their subjectively-defined ends optimally.

Individualism, a focus on the individual as opposed to society

Individualist anarchism, anarchism that exalts the supremacy of the individual

Machiavellianism (psychology), a tendency to deceive and manipulate others for personal gain

Selfishness, denoting the precedence given in thought or deed to the self, i.e., self-interest or self-concern

Selfism, a pejorative term referring to any philosophy, doctrine, or tendency that upholds explicitly selfish principles as being desirable

Suitheism, the belief in self as a deity

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define egoism

wikipedia egoism

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kotobank egoism

jisho egoism