Concubinage, an interpersonal relationship with a lower legal status than marriage, has historically reflected social inequalities. From colonial Europe to imperial China, it functioned as both a social institution and a mechanism of power. Authors such as Robert A. Watson emphasized its intricate legal position, while Wilson Armistead criticized its exploitation.
Alice Mabel Bacon associated it with the subjugation of women, and Madame d'Héricourt called for its regulation. These viewpoints illustrate concubinage as a complex phenomenon, influenced by cultural norms and legal structures, which ultimately highlights its role in shaping familial and societal hierarchies.