<link rel="stylesheet" href="//fonts.googleapis.com/css?family=Roboto%3A300%2C400%2C500%2C700%7CRoboto+Slab%3A400%2C700">More evidence God "evolved" to make us co-operate - Filthy Monkey Men

Most cultures have a belief in a god (or gods), but only a few believing in a “law giving” god. However, whilst there are relatively few groups with a “king” deity they tend to be much larger than those without it.

A few years ago researchers noticed this pattern. The larger the group, the greater the chance they had a deity bossing them about.

Based on this these researchers speculated that these “gods” may have evolved in these populations to foster co-operation in the larger groups.

Sure enough, subsequent research vindicated this hypothesis. And now more research has done it again!

Speculative science

In 2012 researchers noticed a strange correlation between group size and belief in a “law giving” king deity.

The number of societies with a belief in a law giving god, broken down by population size

The number of societies with a belief in a law giving god, broken down by population size

Only ~5% of societies with less than 1,000 people in believed in a law-giving God. However, more than 40% of groups with >10,000 members believed in such a deity; with an additional 40% also believing in an inactive God. This correlation also followed across group complexity. The greater the level of social complexity in a group, the greater the chance they had a king god.

Based on all this, the researchers speculated that group complexity and size fostered conditions where a king god could “evolve”. Humans are good at co-operating with small groups of people, but not 10,000. They hypothesised that these deities – and their commandments to not steal – helped these groups function at such large sizes.

Recently, another study seemed to confirm this. They found that every culture they examined with a king god was more prone to co-operate than those without.

Well, they didn’t actually find that they were more prone to co-operate. Rather, they conducted a survey and found that a belief in a law-giving God was correlated with increased levels of empathy, altruism, compliance, and honesty.

And also with increased levels of sexual prudishness.

But just because someone says they’re altruistic in a quiz doesn’t mean they actually are. That’s something which actually needs to be tested. Which is where this latest research comes in.

Actual science

The most recent paper on the subject set out to perform actual experiments on people to see if believing in a law-giving god really did make them more likely to co-operate.

This test consisted of two games. In both, participants are given several coins, two pots, and a die. They have to mentally assign a pot to a side of the die, then role it and place a coin in the pot that comes up. Since the assignation is mental, there is the opportunity to cheat.

In the first test, the pots were labelled “self” and “far away person from the same religion”. In the other, it was “nearby person of the same religion” and “far away person of the same religion”. In both experiments the coins from the pots were given out to these people. So if someone lied in the “self” game they could profit.

How people divided up the reward compared to how "punish-y" they rated their god. 15 is a fair split

How people divided up the reward compared to how “punish-y” they rated their god. 15 is a fair split; which was seen in those who gave their god the highest punsh-y rating

And yet when they had a belief in a law-giving king god (particularly one likely to punish humans for transgression) they didn’t lie. They divided up the coins fairly as the die decreed. They were willing to disadvantage themselves (and their neighbours) if they though that is what their deity wanted.

This confirms the hypothesis that these deities help foster co-operation in large groups. Participants were willing to help complete strangers outside their social circle under the influence of their religion.

But what provides extra confirmation is the fact this study was cross-cultural. Individuals from Russia, Brazil, Tanzania, and more, all followed this same pattern. The more they believed in a king god, the more they behaved. It was also cross-religion, with Hindus, Christians, Buddhists, ancestor worshipers, etc. all showing this pattern.

This confirms the research results aren’t WEIRD. And confirms the hypothesis that these king gods do foster co-operation. Which raises the question: is this the only factor involved in their evolution, or was there another reason too?


Yet more research has confirmed that there is a strong link between co-operation and “king” gods. Except this time they did it with actual experiments!


Peoples, H.C. and Marlowe, F.W., 2012. Subsistence and the evolution of religion. Human Nature, 23(3), pp.253-269.

Purzycki, B.G., Apicella, C., Atkinson, Q.D., Cohen, E., McNamara, R.A., Willard, A.K., Xygalatas, D., Norenzayan, A. and Henrich, J., 2016. Moralistic gods, supernatural punishment and the expansion of human sociality. Nature.

Schmitt, D.P. and Fuller, R.C., 2015. On the varieties of sexual experience: Cross-cultural links between religiosity and human mating strategies.Psychology of Religion and Spirituality, 7(4), p.314.

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philipcoggan · 25th February 2016 at 2:16 am

Can I ask, can a “king-god” who gives laws also be defined as one who punishes those who break them? I ask this because of my experience in Cambodia – no king-god (Buddhism has the Five Precepts but they’re very general and the only one that’s rigorously observed is the prohibition on taking life), but in the villages the spirits will punish anyone who breaks social norms – there are spirits who punish those who mistreat their domestic animals, different spirits who punish girls who have sex before marriage, yet others who punish those who fail to respect parents and ancestors. These are social norms, not written law-codes, but everyone knows that punishment will follow any breaking.

    Adam Benton · 25th February 2016 at 9:55 am

    I’m unfamiliar with that specific example, but surely in that case the village spirits would meet the requirements of “king god”. Granted they might not be what we think of when we imagine such a deity, but they seem to fit the bill.

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