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Message: <blockquote data-quote="MelaninWarlord" data-source="post: 58198" data-attributes="member: 428">Hunter-Gatherer Societies (the environment in which humans evolved for ~95% of our history)Single motherhood was extremely rare and usually short-lived.Child survival depended heavily on biparental (and alloparental) investment: fathers provided meat and protection, grandmothers and aunts provided weaning foods and childcare.Anthropological data from contemporary forager groups (Hadza, !Kung, Ache, Hiwi, Yanomami, etc.):~70–90% of calories for a weaning child came from people other than the mother, especially fathers and grandmothers.Children without an investing father had 2–4× higher mortality before age 15 (meta-analysis by Sear & Mace, 2008; Marlowe, 2000).Women almost never raised children completely alone; a woman without a husband quickly remarried or returned to her natal kin.Result: sustained single motherhood was ecologically almost impossible. A woman who tried it faced strong social pressure and very high child mortality.Early Agricultural & Ancient Civilizations (from ~10,000 BCE to ~1800 CE)Single motherhood existed but was heavily stigmatized and usually tied to very low social status:Mesopotamia, Egypt, Greece, Rome, medieval Europe, ancient China, etc.: children born out of wedlock were legally disadvantaged (often couldn’t inherit).Widows sometimes remained single, but they almost always lived with adult children or kin or remarried.Effective rate of children raised without a father present was low (typically <10% in most pre-modern censuses).High child mortality + labor-intensive farming meant two adults (plus kin) were still the norm for successful child-rearing.Modern Western Societies (1960 → 2025)We see an unprecedented explosion:United States: 40% of children born to unmarried mothers (2023); ~50–60% of children will spend some time in a single-mother household.Nordic countries: 50–60% of births outside marriage (but high cohabitation kept father involvement higher until recently).United Kingdom: ~48% of births outside marriage.Black American community: ~70% of children born to unmarried mothers.Why the Modern Explosion Is Evolutionarily NovelThe ecological conditions that made single motherhood lethal or impossible for 300,000 years have been removed in <100 years:Factor that historically prevented single motherhoodModern change that enables itChild survival required father provisioning & protectionWelfare state, formula, vaccines, low violence → child survival >98% even without fatherNo inheritance or social status for fatherless childrenLegal equality + child-support enforcement (weak but exists), anti-discrimination lawsWomen economically dependent on men or kinFemale wages, education, contraception → economic independenceStrong kin network enforced male investment & remarriageGeographic mobility, urbanization → isolated nuclear units or lone mothersHigh social stigmaStigma collapsed (1960s sexual revolution onward)Serial monogamy or polygyny enforced repeated interactionsDating apps, high divorce, weak repeated-game punishment → men can leave with low costIn short: the modern environment is the first in human history where a woman can have multiple children by different fathers, raise them to adulthood with almost no male investment, and do so without severe social or economic penalty. This is an evolutionary mismatch of historic proportions.From a life-history perspective, many women (especially those calibrated to “fast” strategies in unstable or resource-rich-but-socially-chaotic environments) now pursue the evolutionarily familiar strategy of high mating effort + low parental effort, but the usual fitness penalty (dead children) has been removed by technology and the state. The result is the highest sustained rate of father-absent child-rearing in Homo sapiens’ existence.</blockquote>

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