Joseph Henrich

As an anthropologist, Joseph Henrich realised that much of the published work (and hence commentary) on human psychology (and social sciences at large) were based on work with experimental subjects who were based in or around Western universities. And when attempts were made to replicate these results with people in Africa/Asia, some of them even elites, it came to light that the subject pool was biased. They were WEIRD – Western, educated, industrialised, rich, democratic – and though only a small part of the species, are disproportionately represented in culture and thinking. How did this happen? That’s what The Weirdest People in the World is all about.

He sets the stage with the influence of Protestantism in this. Its credo of the individual’s personal relationship with God spurred the belief that a person should read the Bible (sola scriptura), increasing literacy in the process. But beyond this, he points out that religious convictions shape decision-making, psychology, society and culture at large.

But what is the WEIRD psychology? Broadly individualism and personal motivation (self focus, guilt over shame, dispositional thinking – based on intent not context, low conformity, self regulation and control and patience, time thrift, value of labour, desire for control and choice); impersonal pro-sociality (impartial principles, trust, honesty and cooperation with strangers and impersonal institutions, emphasising mental states in moral judgment, not revengeful but willing to punish third parties for not sticking to principles, reduced in-group favouritism, free will, belief in moral truths like physics principles, linear time), and perceptual and cognitive abilities and biases (analytical over holistic thinking, attention to foreground and not surroundings, endowment effect, overconfidence on own abilities)

To understand how people became WEIRD, he brings up the importance of cultural learning in evolutionary psychology. “Unlike other animals, we have evolved genetically to rely on learning from others to acquire an immense amount of behavioural information, including motivations, heuristics, and beliefs that are central to our survival and reproduction.” From our own motor patterns to projectile technology and food processing to grammar and social norms. Cultural learning adaptively rewires our brains and biology to calibrate them for navigating our culturally constructed worlds. This is cumulative cultural evolution.

It started off with kinship altruism, which other primates too possess, and extended to pair bonding and marriage, which is the most primeval of the institutions we have created. Preferred sexual access and a guarantee of paternity in return for protection and providing for the family. This paternity certainty and norms to cement it is where we start differing from most other primates. This also creates in-laws (affines) forming connections with more people who are not genetically related. From there on, basic communal rituals like dance, drills etc also bind people together with “mind hacks” through mimicry and a suggestion that others are like us and have an affection for us.

The next big shift was agriculture, which necessitated securing and holding lands. This needed co-operation and gave an edge to those communities with more social norms – rituals, beliefs etc. Fierce competition between groups generated a coevolutionary interaction between agriculture and societal complexity. And so, though farming was less productive and even less nutritious than hunting and gathering at an individual level, between sedentism and productivity of the unskilled (young) labour, farmer communities just reproduced more quickly and removed/assimilated hunter-gatherers.

Further inter-group competition led to clans which were kin-based institutions. These then became chiefdoms and premodern states. Built on norms and beliefs. And then non-kin based institutions developed between the elites and others to create stratified societies. e.g armies, tax collection.
In the meanwhile, religion, based on our supernatural beliefs and worldviews, started scaling cultural evolution by creating ‘doctrinal’ rituals – prayers, hymns, parables etc and being transmitted by successful people – prophets and community leaders. These gave people a sense of unified commitment (conforming) and further evolved with identity markers- dresses, ornaments, taboos etc. By powerfully shaping behaviour and psychology, religion played a key role in forming higher-level political and economic institutions.

Thus begins another central point in the book – the role of the Church (and its MFP – Marriage and Family Program) in creating WEIRD people. The Church systematically started breaking the foundational kin-based societies using prohibitions and canon laws (marriage, adoption, divorce, polygamy, wills etc) over many centuries in Europe, ‘threatening’ people with divine retribution (in the afterlife) and excommunication (immediate). By allowing rich patrons to ‘pay’ with money and church-building, the Church continued to grow at the expense of the kin networks.

With more and more people marrying and working outside the kin network, cultural evolution started favouring a psychology that was more individualistic, analytically-oriented, guilt-ridden (as opposed to shame – guilt depends on one’s own standards and self-evaluation while shame depends on societal standards and public judgement) and intention focused (in judging others) as opposed to being bound by tradition, elder authority, and general conformity.

An important part is how monogamy became a norm though logically polygynous works for both men and women (because women could be second wife to the best hunter rather than only wife to an average hunter). It evolved because it can give religious groups and societies an advantage in intergroup competition. By suppressing male-male competition an altering family structure, monogamous marriage shifts men’s psychology in ways that tend to reduce crime, violence, and zero-sum thinking while promoting broader trust, long term investments and steady economic accumulation. Basically a testosterone-suppression system to reduce intra group competition. Between this and suppressed fertility (increased age of marriage, no pressure from kin, education for women) nuclear families started to focus on investing in their child – nutrition and education.

These changes also led to urbanisation as people travelled to places where they could find mates, vocation etc and expanded impersonal networks (trust in strangers as opposed to interpersonal kin networks) based on interests and worldviews, leading to universities, guilds and charter towns, who competed with each other to attract people. A pre cursor to the transition to political parties in later centuries. Another factor at play was wars. Though intuitively, one might think it derails progress, it actually builds intra group bonding and spurs technological advancements.

A rising middle class started demanding more rights, freedoms and privileges, leading to refinement of ideas, and acceptance of concepts like ownership and laws. Between this, impersonal networks and commerce, attributes like patience, time thrift (fascinating how clocks developed and changed the notion of time – wages per hour, need for efficiency, common market hours, contracts), self-regulation and positive-sum thinking (everyone can gain by advancements, I don’t need to be selfish or envious) began being appreciated as qualities one would want in self and other people, in order to distinguish themselves and prosper. These mindsets explains the kind of representative governments, laws, and the innovation and economic growth since then. The Industrial Revolution, for example, was fuelled by the expanding size and interconnectedness of Europe’s collective brain. In the political sphere, Protestantism, also a part of the larger religious cultural evolution, encouraged democratic institutions. Unlike the hierarchical Church, it requires communities to develop self-governing religious organisations using democratic principles. The cultural evolution can also explain things like patent concentration (in countries and regions) and economic characteristics at large in the contemporary era.

I can now easily see how the same principles apply to even India in the last say, five decades – better connectivity, educational institutions, urbanisation, reduction of kin bonds, and how that makes the 1% in the country closer to WEIRD than their own ancestors. This is a fascinating book supported by a ton of data and studies, and my only complaint is that like many other academics, Henrich too succumbs to the tendency of extensive usage of the latter at the risk of the narrative flow (instead of an appendix). But I’d still recommend it and between this, “Being You” (reality as a controlled hallucination and the brain only seeking to survive/control), and “The Master and His Emissary” (the hijacking of the narrative by the left brain especially since the Industrial Revolution), there emerges a phenomenally insightful view of the brain, its motivations and the interaction with cultural evolution. I really must repeat all these three soonest!

The Weirdest People in the World is a fascinating read and is in my favourite reads of 2024.