C1 noun /ˈiːɡoʊˌɪzəm/
egoism
Egoismus
Meaning
An ethical theory that treats self-interest as the foundation of morality; also, excessive preoccupation with oneself.
Example
His decisions were often driven by egoism rather than concern for others.
Seine Entscheidungen wurden oft vom Egoismus angetrieben, statt von der Sorge um andere.