The Price of Denying Human Nature: Why Leftism’s Blank Slate Fantasy is Collapsing

For decades, the modern Left has operated on a foundational myth: human nature is a fiction, a malleable blank slate that can be reshaped through education, policy, and social engineering. Postmodernism told us truth itself is a social construct. Feminism insisted sex differences were oppressive inventions of the patriarchy. Transgender ideology now demands we deny biological reality altogether, rewriting chromosomes, sports, prisons, and language to affirm feelings over facts. This denial of human nature wasn't a side project; it was the beating heart of Leftist progressivism.

A powerful new essay in Schweizer Monat, "The Price of Denying Human Nature," lays out the devastating cost of this delusion with clarity and evidence. The bill is finally coming due, and reality is returning with a vengeance.

Twin studies provide some of the most replicated findings in behavioural genetics. Identical twins raised apart become more similar with age, in personality, intelligence, political views, even quirks and preferences. Heritability estimates are striking: height 80–90%, intelligence 50–80% (rising in adulthood), body weight around 60%. As environments improve and basic needs are met, genetic differences become more visible, not less. Equality of opportunity doesn't erase human variation, it reveals it.

The "non-shared environment": the unique experiences we once thought moulded us, explains far less than assumed. Much of what social scientists called "environment" is itself genetically influenced. Parents don't sculpt their children like clay; they provide relationships. The blank slate has produced generations of anxious parents burdened with illusory responsibility for every outcome, and it has justified disastrous policies from Freudian mother-blaming to Soviet-style social engineering.

This denial of human nature licensed some of history's greatest horrors. Marxism's New Soviet Man assumed people could be remade by the right institutions. The body count exceeded 100 million. Closer to home, postmodernism and its offspring, critical theory, gender studies, and radical feminism, turned universities into indoctrination centres that rejected objective reality in favour of power narratives. Sex became a spectrum, merit a construct, and dissent "violence."

Feminism's war on sex differences produced similar distortions: declining marriage and birth rates, confused boys pathologised for natural masculinity, and working-class women bearing the brunt of family breakdown. Postmodern relativism eroded the shared truths that hold societies together.

The good news is that the fantasy is cracking. Twin studies, behavioural genetics, and evolutionary psychology have accumulated overwhelming evidence that human nature is real, persistent, and largely heritable. Markets, biology, and everyday experience are reasserting themselves. Enrolment in grievance studies is plummeting. Parents are rejecting gender ideology in schools. Voters across the West are turning against open borders, net-zero zealotry, and cultural self-erasure.

As the Schweizer Monat piece notes, understanding our nature doesn't limit freedom, it enhances it. Knowing genetic predispositions allows us to work with reality rather than against it. Ignoring it leads to serfdom: fighting battles we cannot win while ignoring the ones we can.

Leftism's blank slate project was always doomed because human nature cannot be wished away. The catastrophes it produced, from communist gulags to today's fertility collapse, mental health crisis, and social fragmentation, stand as warnings. The return of realism, grounded in evidence about heredity, sex differences, and evolved psychology, offers a path forward.

Societies that respect human nature, with its strengths, limitations, and beautiful variations, can endure. Those that deny it will pay an ever-higher price until they break. The tide is turning. Reality always does.

https://schweizermonat.ch/the-price-of-denying-human-nature/