Reddit mentions of In Gods We Trust: The Evolutionary Landscape of Religion (Evolution and Cognition)

>This is a good explanation of in what contexts people are inclined to make snap judgments/stereotype: when the costs of getting it wrong are high and there isn't better information available, we'll be more willing to use a criteria that has a lot of false positives.

I recently read a book that suggested this is the origin of religion.

I recommend:

Religion Explained: The Evolutionary Origins of Religious Thought by Pascal Boyer on the origins of superstitious and supernatural thinking

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In Gods We Trust: The Evolutionary Landscape of Religion by Scott Atran on why the tendency towards religiosity was preserved for its social utility instead of being eliminated.

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More than Nature Needs: Language, Mind, and Evolution by Derek Bickerton on the origins of language.

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A Natural History of Human Morality by Michael Tomasello on the origins of morals.

Scott Atran attempts to answer this question in his book, In Gods We Trust: The Evolutionary Landscape of Religion.

It's not light reading, but shit is ridiculous, yo.

5.) I've heard it said that religion is a product of evolution, but this seems counterintuitive to me. How and for what purpose would religion be implemented into the framework of evolution?

Religiosity is a product of evolution.

Large brains are expensive. The brain is responsible for 20% of the energy human bodies use (compared to 13% for chimps, and 2-8% for other vertebrates - source). Visually-oriented animals in a competitive hunter-prey environment conducive to hiding and stalking (such as a forest or savannah) who can recognise patterns in incomplete data thus generating hypotheses to explain what they are seeing, gain an advantage from this ability to predict., and so tend to have larger (or more active) brains for their body size.

The evolutionary pressure is not towards making perfectly accurate hypotheses. Rather, the advantage goes to the animal who generates an hypothesis quickly enough to escape a tiger before the tiger pounces, and there is a bias towards seeing a pattern where none exists, over missing a pattern where one does exist, because it is better to run away from shadows unnecessarily nine times if, on the tenth time, you escape being pounced upon. (Or, from the tiger's point of view, the reward of catching a meal outweighs the cost of investigating a few rustling bushes that turn out to be just the wind.)

Compared to plants, the bodies of other animals provide a rich bounty of calories and nutrients. Animals, such as wolves, dolphins and apes, that hunt as a group using tactics (and who communicate to coordinate) can afford larger brains if using group tactics provides a sufficient advantage in calories gained that it compensates for the additional calories expended in the thinking needed to do the prediction, coordination and awareness of social roles/status required to carry the tactics out.

Bipedalism offers apes a number of advantages (reach higher, wade deeper, run faster, see further) however the resulting hips compared to the adult brain size means that the children are born at a comparatively earlier developmental point compared to non-bipedal animals or ones with smaller brains. Baby chimps or humans are helpless and dependant upon their mother for much longer than baby lions or horses, despite lions and horses being large animals with a long life expectancy. This vulnerable stage (and the necessity for group defence against external threats) leads to a species with complex social dynamics, interactions and emotions. This extended childhood also provides an adaptive advantage to those family units where the children have a prolonged 'tame' phase in which the children remain in the safety of the authority of the adult parental figures, accepting what they say as true, learning from them, trying to 'fit in'. In dogs and cats that are domestic (as opposed to feral) you also see this personality phase prolonged into adulthood.

There is much more to the tale of why it was humans who have developed the intelligence they have, and where factors like tool use, fire, specialisation, trade, sexually-selected for ornamentation and Machiavellian social politics come into it. Too much to do justice to here - if you're interested I recommend the books "Up from Dragons" and "The Ancestor's Tale". However we have enough of the tale to now start talking about magic and religiosity.

Magical thinking is a by-product of pattern recognition. When a creature sees that two things are correlated and decides that one of them is causing the other, they are sometimes right and sometimes wrong. When it works, that can be very important. The principle of sympathy (like produces like) gives a prediction that's better than a random guess in many situations, and the principle of contagion (what happens to one bit, happens to the rest of the thing) has predictive power in situations relating to disease, contamination, complex social situations, or anywhere there may be a hidden third factor at work.

When magic thinking is combined with the ability to hypothesise the intentions of a sentient being behind otherwise unrelated events (an important ability in Machiavellian social politics), we get Animism (and Totemism) - the hypothesis that there are sentient spirits associated particular locations or things, that can influence physical reality, that have emotions and personalities, and that can be influenced by actions in physical reality.

Combined with some features of how consciousness is implemented in our brains that leads to the illusion that consciousness never ceases, and it is a short step from spirits to ancestor worship and the idea that humans have a spirit that lives on after death. These basics are a cultural universal, which indicates they have a biological basis rather than a culture-specific one. Not only are these polytheistic beliefs present in the earliest hunter-gatherer cultures we know of (the San Bushmen in Africa, and Aboriginal Indigenous in Australia), there are strong indications (eg burial, and flowers left on graves) that Neanderthals had them too.


In terms of the neurology of the brain, modern religions are not much different. Religiosity is how religious a person is - how much they think, feel and behave in a religious manner. Many studies have investigated the question of whether religiosity is due to genetics, shared parental environment, personality or other factors. What they've discovered is that multi dimensional scaling can be used to factor religiosity into three dimensions:

Involvement (Are supernatural agents, eg the Christian God, involved with life on a daily and personal basis?)
Emotion (Are these supernatural agents more loving and forgiving, than wrathful and punishing?)
Knowledge (Does religion tell us more about the big picture, eg "How the world was created?", than about the small picture, eg "How should I vote in the next election?")

and that these dimensions each directly correspond to activity in three specific parts of the brain involved with Theory of Mind. This directly explains why people on the autistic end of the spectrum tend to have a lower religiosity than people on the schizophrenic end of the spectrum (link). It also explains why there is a strong correlation between religiosity and scores on two of the four Myers-Briggs scales ("Sensing (S) vs. Intuition (N)" and "Thinking (T) vs. Feeling (F)" ) with people on the NT end being less religious, on average.

Here's an article with more in-depth information about the neuroanatomy of religiosity, but before I leave the brain, I want to touch on the debate over whether it is the brain causing the religiosity or whether it is how a person has thought and used their brain while growing up that is the cause of the changes in the brain. The latter may have seemed plausible 20 years ago, but they have since done twin studies and even tracked down specific genes. There is definitely a significant genetic component to religiosity, and a majority of the causality between brain and practice is in the direction of the brain affecting the practice not vice versa.

In other words, if there's a supernatural creator who designed humankind, then He deliberately created some individuals to be, right from birth, less likely to believe in Him.

So, if religiosity is significantly genetically based, why wasn't it selected against in the tribal environment? In evolutionary terms, religiosity started as a spandrel - a by-product of something else that is selected for. However, once it had started, it turned out that religions can have positive effects upon the survival of the genes of a tribe of believers. By appealing to the human instinct for a protective authority to shelter them, it improves cohesion and discipline in a tribe. In times of war, the idea of luck and a protective spirit you can pray to (a concept straight out of totems and magical thinking, and something you often see when people roll dice) improves morale. In times of peace, the idea of reward or punishment being handed out in an afterlife makes people more content with the status quo, reducing anxiety (which improves health). For these group selection effects not to suffer from the 'free rider' problem, it is also necessary for religions to include a doctrine of shunning or otherwise punishing members of the tribe who refuse to act as though they believe. (The logic behind the power of blood and sacrifices, by the way, stems from the contagion part of magical thinking, and is very useful for a religious leader when it comes to demanding tithes, altruism or picking people to go out to fight on the religion's behalf in battle.)

We're now going to move on to look at what happened when this instinctive religiosity moved from a tribal environment to larger, more complex societies, and whether it remained an adaptive advantage. However, before I do, here are some links to the growing body of research that's been done on this topic:

Evolutionary Religious Studies - resources page
EXREL
The Adaptive Logic of Religious Beliefs and Behaviour
In Gods We Trust

READ THIS BOOK: I HAVE IT, ABSOLUTELY ESSENTIAL FOR UNDERSTANDING RELIGION

http://www.amazon.com/Gods-Trust-Evolutionary-Landscape-Evolution/dp/0195178033/ref=sr_1_1?ie=UTF8&s=books&qid=1246574393&sr=8-1

"This ambitious, interdisciplinary book seeks to explain the origins of religion using our knowledge of the evolution of cognition. A cognitive anthropologist and psychologist, Scott Atran argues that religion is a by-product of human evolution just as the cognitive intervention, cultural selection, and historical survival of religion is an accommodation of certain existential and moral elements that have evolved in the human condition."

"Atran's work is a brilliant exposition of the evolutionary by-product interpretation [of religion] as well as a mine of references for empirical research into the psychology of religion." -- Pascal Boyer, Current Anthropology

By their descriptions, these 2 seems pretty good:
https://www.amazon.co.uk/Religion-Explained-Evolutionary-Origins-Religious/dp/0465006965/ref=cm_wl_huc_item

https://www.amazon.co.uk/dp/0195178033/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=1HZOGMRHHFYH5&coliid=I3K9Q1SNLXH4Z2