Confucian and Collectivist Roots: In traditional Chinese society, which emphasizes collectivism, the well-being of the group (family, clan, society) often takes precedence over the individual. 无私 aligns perfectly with Confucian ideals where a person's moral duty is to their family and community. A parent's love for a child is often described as the ultimate example of 无私的爱 (wúsī de ài), or “selfless love.”
Socialist Ideal: After the founding of the People's Republic of China, the concept of 无私 was adopted and amplified to promote socialist values. It was used to praise individuals who sacrificed personal gain for the good of the country, the people, and the Party. The most famous example is 雷锋 (Léi Fēng), a soldier whose diary (published posthumously) was filled with accounts of his selfless deeds. The “Lei Feng Spirit” (雷锋精神, Léi Fēng jīngshén) became a nationwide campaign promoting 无私奉献 (wúsī fèngxiàn)—selfless dedication.
Comparison to Western “Altruism”: While “altruism” is a close equivalent, 无私 in a Chinese context often carries a stronger weight of duty and obligation. Western altruism is frequently viewed as a personal, voluntary choice made by an individual. 无私, however, is often framed as the expected, correct, and honorable way to behave within one's role—as a parent, a soldier, a doctor, or a good citizen. It implies a more complete negation of the self in favor of the collective.