Egoism

See Ethics

"Life can be kept in existence only by a constant process of self-sustaining action. The goal of that action, the ultimate value which, to be kept, must gained through its every moment, is the organism's life. .... An organism's life is its standard of value: that which furthers its life is the good, that which threatens it is the evil." "The Virtue of Selfishness", Ayn Rand