noun
human nature; humanity; humanism
Refers to the inherent qualities, instincts, or moral nature of humans. Often used in philosophical, ethical, or literary contexts. 'Humanism' is a less common gloss, typically in discussions of humanistic thought.
彼は人性の善悪について深く考えている。
He thinks deeply about the good and evil of human nature.
この小説は人性の複雑
This novel depicts the complexity of human nature.
From 人 (human) + 性 (nature, character). The exact historical derivation is uncertain, but the kanji compound directly conveys the meaning of 'human nature'.