Peer-reviewed article
Married Too Young? The Behavioral Ecology of ‘Child Marriage’
Susan Barris Schaffnit, David W. Lawson ·
Summary
Written by AI, not yet AICS's view · claude-haiku-4-5-20251001This theoretical paper examines why early marriage (under age 18) persists in low-income countries despite documented negative effects on girls' wellbeing. Using behavioral ecology frameworks, the authors propose four explanations: that early marriage may be adaptive when life expectancy is short, that parents may profit economically at daughters' expense, that girls may seek to escape household labor through early marriage, or that it represents the best available option for disadvantaged families. The paper argues that understanding these context-specific drivers is essential for developing effective policies.
Key points
- Early marriage may be adaptive for reproductive success in contexts with short life expectancy, despite negative wellbeing consequences
- Parent-offspring conflict can explain early marriage when parents benefit economically while daughters' interests are harmed
- Girls may use early marriage as a strategy to gain emancipation from labor in their birth families
- Disadvantaged families and girls may view early marriage as the best available option when alternatives are lacking
- The explanatory power of each hypothesis is context-dependent, requiring tailored rather than universal policy approaches
Limitations
This is a theoretical paper that evaluates existing hypotheses rather than presenting new empirical data or evaluation of an intervention. It does not provide evidence about which explanations are most important in specific contexts or what outcomes result from different policy approaches.
Abstract
For girls and women, marriage under 18 years is commonplace in many low-income nations today and was culturally widespread historically. Global health campaigns refer to marriage below this threshold as ‘child marriage’ and increasingly aim for its universal eradication, citing its apparent negative wellbeing consequences. Here, we outline and evaluate four alternative hypotheses for the persistence of early marriage, despite its associations with poor wellbeing, arising from the theoretical framework of human behavioral ecology. First, early marriage may be adaptive (e.g., it maximizes reproductive success), even if detrimental to wellbeing, when life expectancy is short. Second, parent–offspring conflict may explain early marriage, with parents profiting economically at the expense of their daughter’s best interests. Third, early marriage may be explained by intergenerational conflict, whereby girls marry young to emancipate themselves from continued labor within natal households. Finally, both daughters and parents from relatively disadvantaged backgrounds favor early marriage as a ‘best of a bad job strategy’ when it represents the best option given a lack of feasible alternatives. The explanatory power of each hypothesis is context-dependent, highlighting the complex drivers of life history transitions and reinforcing the need for context-specific policies addressing the vulnerabilities of adolescence worldwide.