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The key aspect, however, is that in addition, the people experiencing these states never has the same content to their states and experiences as others. The content always derives from their personal experience, largely recapitulating the religous teachings they were taught. If such religious experiences were indeed driven by genetic factors in the personality, then there would be such a common content and/or sequence, whatever the overlay of learned material.
I kind of covered this above, but to give another analogy, take a look at sleep-paralysis. The symptoms are always the same: difficulty breathing, the feeling of weight on one's chest, inability to move anything but the eyes, and the sensation of a malevolent presence in the room. In the 19th century west people tended to interpret the experience as a visitation by a ghost, often the Grey Lady, a sort of pop-culture scapegoat figure of evil in that time. Now this experience is often interpreted as alien abduction, a current pop-culture belief.
Certainly Jesus or Zeus or Mohammed are not psychological phenomenon, and none of the specific ritual involved in the religions that worship them are either. The tendency towards ritual and belief, however, is. Cargo Cults are a great example of this. They did not need a charismatic leader to develop, and they developed with extreme rapidity simply because people are innately wired to believe. Some more than others, and perhaps some not at all, but most of us are. The Fantasy Prone Personality is a recognized personality type. These people tend to be either very religious, or very spiritual, and very likely to quickly adopt non-scientific beliefs (like chi or homeopathy). These people are simply on the higher end of the spectrum. Every bit of scientific evidence on the subject supports that stance that religion/spirituality is brain-based.
Plus, of course, people do have odd psychological states and experiences yet do not recognize them as religious states or experiences. If religion is indeed supposed to be some sort of natural human emotion, this is an absurdity. If religion is supposed to be some sort of preprogrammed thinking, as in the hypothesis that religion develops from a genetic disposition to impute agency to objects in the environment for instance, then I can only note all such proposed mechanisms (that I know of) are observable primarily in children, but children do not have religion.
Again, think of the language analogy. Children are innately programmed to acquire language, but they are not born speaking Mandarin or Dutch. They have the ability, and without guidance can even develop some rudimentary language, but they must be taught if they are to speak. So too with any religion. A child has the wiring that encourages belief or religiosity, and through social interaction the specific beliefs are taught.
To me it seems you're oversimplifying things and also creating a false dichotomy; just because religion is perpetuated by social and political pressures doesn't mean it has no biological foundation. Our personalities are a complex mix of nature and nurture...
You can trace the effects of an emotional drive, sexuality, which is genuinely founded in human biology in different cultures. Unlike religion, we do see commonalities across culture, along with culturally specific traits. This is indeed a complex mixture of nature and nurture. Religion has none such. It is much more like arithmetic. Presumably if religion has a defining emotion, it must be belief. Belief however is quite obviously not a genetically determined universal.
But religion does have these commonalities, as I noted above. The specifics aren't what's important, the motivations and experiences are, the ritual, the looking to a higher power, the projecting of intelligence onto nature, these are the commonalities, and the fact that pretty much every culture that has ever lived had some sort of religion is even more evidence that it is based in biology.
What precisely it is that was supposed to be written by nature about religion, so that the supposedly nonsensical tabula rasa is not rasa? As it turns out, the evolutionary psychologists continually equivocate about what religion is. Is it the belief in a providential God? You could ask a thousand question. There is no trait about "religion" common to all cultures, yet if it was founded in biology, there must be something. The evolutionary psychologists reduce all religious phenomena to something undefined, declare all cultures have "it," conclude that it must be biological, that since it's biological it must be evolutionarily beneficial.
Beneficial
or incidental; it could easily be a byproduct or a fluke. I agree that evolutionary psychology doesn't warrant a whole lot of faith (if you'll forgive the expression) and I even said just that in an earlier post. That's why I brought up current neurological evidence as well.
People in social institutions necessarily have individual feelings and thoughts about those institutions. People in families, as childrens, have emotional needs. Despite the complex variations in cultures, there are certain commonalities, especially in the simple existence of those childrens' emotional needs. There are no such emotional needs in childrens' experience of religion. There are no commonalities in their emotional experience of their religious development, as in the development of their emotional capacities for empathy etc. It is the emotional indifference that permits such disbelief that shows emotion is not rooted in human nature. There are no children indifferent to their parents, but all children are indifferent to God, until taught.
Partly addressed above. But... "emotion is not rooted in human nature"? What? Of course emotion is rooted in human nature! Unless you're a dualist or an idealist I cannot comprehend how you could think it's not. Emotion is caused by a complex interaction of brain structure, chemicals, and electrical impulses. We can watch emotion on a PET scan...we can manipulate it with alcohol and drugs. Hell, I'm a type one diabetic and can speak from personal experience as well as empirical evidence in saying that blood sugar levels affect emotion! I'm sorry, but if you don't think that emotion is part of human nature then you have a serious lack of understanding of how the brain works.
Think of it like a language: every person has the innate and instinctual capability to develop language, and we all learn different languages from our parents. Some people have a greater talent for it though, and some have deficiencies. Religion is the same: people have an innate, evolved ability to be religious (some see it simply as paradolia gone wild). If a person is raised religious, then that part of his or her brain is reinforced and develops more strongly. Some people are deficient in their religion abilities. Some, like me, are so deficient that they never believe, others more easily convert to non-belief. To state that religion has no basis in psychology completely contradicts all the research ever done into the question.
No, neither individuals nor races have differing capacities for language. Some unfortunate individuals have developmental disorders. A rare few were not exposed to language when the critical period for the development of this skill took place (wolf boys, for example) and never developed proper language skills.
Here is where you are very, very wrong. I would recommend reading
The Language Instinct, or pretty much any other book by any other linguist or neuroscientist to learn why you are wrong. We do have an innate capacity for language. Language is hard-wired
and taught. I'll cite some brief examples of how we know this, but I'd really recommend reading more into it. Also, before I cite these examples I want to make it clear that I'm not talking out of my ass, my degrees are in Special Education (a degree which requires an intense focus in language acquisition), and I just completed my second degree in psychology with a concentration in neurological development, anyway, some examples: The wolf boy case you cited is debatable. There is not a lot of evidence that the boy was actually a wild child, and many believe that he may have simply been a boy with a severe form of autism or other cognitive or developmental impairment who was lost in the woods and later found, ultimately it doesn't really matter as there are some better-documented cases, one of which would be the case of an American girl in the 1970s, who was kept chained to a toilet her entire life and never spoken to. When she was rescued in her early teens she had no language and was severely impaired. Even so, through intensive work with psychologists, she eventually developed some language skills. You are correct that children who are not taught language during a key period will never fully develop it, though. The reason for this is that the brain will atrophy if it is not nurtured. Kittens, for example, that had their eyes covered through their early development were blind as adult cats, not because their eyes couldn't see, but because the brain never developed in that area and so never learned to interpret the signals. Children who are not exposed to language at the critical period can develop a little, but the brain has atrophied in the areas responsible for language, so that ultimately their ability never reaches its potential. People who are raised by atheist parents and taught critical thinking skills from an early age may not develop the religious/spiritual capabilities in their brains, that does not mean they are not present.
More evidence that language is inherent: Native English speaking adults cannot distinguish between the sound of a Spanish B and P, yet infants of English speaking adults can until the age of 4 months. The same is true of native Japanese speaking adults being unable to distinguish between the L and R sounds. This shows that we have the capability to learn any language as infants, but that our receptivity declines as we age. Our neurons wire to the language we are raised with, excess neurons are pruned, and thus it becomes more difficult to acquire different languages.
And more: There is a specific combination of genes that was recently discovered (I think around 2008) that are present in people with a greater ability to detect tonal variation in speech. It is highly prevalent in people of Chinese and Vietnamese descent, where the native languages are tonal. While it is uncommon in people of other ethnicities, the individuals who possess it are better able to distinguish between tones.
And more: Humans have better hearing in terms of pitch than any other species tested, even those who have more sensitive hearing and better range.
And more: Grammar is innate. This is why children will often make the mistake of pluralizing irregular plurals with the "s" rule, i.e. "mices" or "gooses". Deaf children who speak sign make the same mistakes. If language was simply learned with no innate grammar, children would simply learn irregular pluralizations (and verbs, for that matter) rather than applying their innate grammar to them.
And more: Individuals certainly have different ability levels when it comes to language, even to the extremes. There are disorders which can affect individuals of normal or above normal intelligence that make it difficult for them to acquire language. Likewise, although rarer, there is a syndrome (I can't remember the name though I think it starts with W, and I can look it up if you're interested), in which individuals are mentally retarded, and yet possess above-average languages skills. They speak eloquently and correctly, but eventual you realize that they make little sense and have no understanding of what they are saying.
And more (possibly the most obvious): Damage to the brain can and often does cause speech impairment.
Mind you, it would take way more time than I am willing to commit to explain each of these examples in further and convincing detail, for that, you can do the research yourself, but you are wrong about language. My analogy stands.
There are no definable religious skills, and there are no parts of the brain that develop these undefinable skills. Mental faculties like pareidolia are not the foundation for religion, even if they are involved in the origin of religious ideas. Religious ideas no more determine social institutions than any other ideas which are not generalizations from social practice. You cannot trace the families which have the genes for this supposed skill and distinguish them from those that do not.
Sorry, but given the lack of understanding of brain function evidenced by your previous statements, I honestly don't think you have any evidence for your claims.
The question of whether an individual person believes or not obviously has to do with their individual psychology. It's not human nature to "believe," especially when one cannot specifiy what they are to "believe." Nor is there an hereditary component to such "belief," or we could write pedigrees for the trait. Every indication is that personal belief then rests upon personal experiences, not genetics. Further, there is no reason to think there is any greater association between belief in religion and bravery in an army, i.e., not much more than a connection between handsomeness and religion, or eye color and an army.
Ditto my previous sentence.
ETA: How do you know there hasn't been "an upsurge in mutant brains"? It's perfectly plausible that we're evolving away from religiosity. There was an interesting TED talk in which the scientist (I think he was an evolutionary biologist), suggests that the human brain is going through a rapid evolution, and that Autism is a product of this. Interestingly, there is also a strong correlation between Asperger's Syndrome and high-functioning autism and atheism. This could be evidence of people evolving away from religiosity.
We'll find out from genetic studies. I know which way I'm betting. As to the notion of people evolving instead of cultures changing, I find the science behind this kind of evolutionary psychology to be horribly weak. Given the human tendency for old ideas like racism to survive in our thinking, except in new forms, there is no reason to give any credence to the evolutionary psychologists. It is true that they dominate the popular science venues. But the retrogression of society would favor the return of racism, in a new, supposedly more scientific guise, wouldn't it?
Again, I also have issues with evolutionary psychology as a field, and again, I noted neuroscientific evidence and psychological evidence. Where I noted evolutionary science theories, I always note them as such and qualify them as possible reasons for an evolutionary foundation to religion, not strict evidence. As for learning from genetic studies, that will take a while. It is a vast oversimplification to say there is a "gene" for this or that. We're more complicated than that. There are things that are linked to certain genes and combinations of genes (for example the combination of genes I cited above that dictates how well a person can distinguish between tones), but just as there is no one area of the brain entirely responsible for a single skill, neither is there any one gene that is likely to be entirely responsible for such a complex psychological phenomenon as religiosity.