A philosophical or psychological term for prioritizing one's own interests or self-centeredness. Often used in contrast with 利他主義 (altruism).
People with strong egoism often don't consider others' feelings.
倫理学の授業で、自己主義と利他主義の違いについて議論した。
In ethics class, we discussed the difference between egoism and altruism.
Compound of 自己 (self) and 主義 (principle, -ism). The term is a direct translation of the Western philosophical concept of egoism.