Homonym: Cynic (Pessimist)
A "Cynic" is a person who generally believes that people are motivated by self-interest rather than altruism. This viewpoint often leads to skepticism about the sincerity of others' intentions and actions. The term originates from the ancient Greek school of philosophy founded by Diogenes of Sinope, who advocated for a life lived in accordance with nature and rejected societal norms.
Cynicism can manifest in various ways, including distrust of institutions, criticism of social conventions, and a tendency to question the motives behind people's actions. While some may view cynics as pessimistic, others see them as realists who challenge idealistic views and encourage critical thinking about human behavior and society.