Female Spotted Hyena Social Inheritance Defies the Darwin-Bateman Evolutionary Paradigm

Gist Researchers have discovered that female spotted hyenas socially inherit their mothers' rank, alliances, and resources, leading to intense reproductive inequality among females. This mechanism allows a single privileged female lineage to eventually dominate an entire clan's genetics. For civil services aspirants studying environment and ecology, this research is significant because it challenges the classical evolutionary theory that males naturally face greater reproductive competition, proving that social structures can drive evolutionary outcomes just as powerfully as genetics. Background The Darwin-Bateman paradigm is a foundational evolutionary hypothesis which proposes that reproductive inequality and mating competition are inherently greater among males. Under this traditional paradigm, female mammals invest heavily in each reproductive event through pregnancy and lactation, making them highly selective about mating, while males compete fiercely to father as many offspring as possible. Consequently, males across the animal kingdom are generally considered the dominant, more competitive sex due to these evolutionary pressures. Spotted hyenas operate in a matrilineal society, but prior to this long-term study, the extent to which social inheritance dictated generational genetic dominance and female-to-female competition was not fully…