Im wondering that if we are the brain why we cant control things like pain and our immune system.
In: Biology
As of yet in this point of our evolution as a species, that characteristic hasn’t emerged as a beneficial factor in passing our genes onto successive generations.
This is the generic answer for why we are what we are in virtually every way.
More specifically, suppose that was a characteristic of some predecessor human. Apparently it didn’t give them enough of an advantage in producing offspring, otherwise it would have persisted to this day. You can speculate why that wasn’t an evolutionary advantage (ie they didn’t understand how to use it and left themselves vulnerable to injurious pain or harmful disease), but ELI5 shouldn’t be for speculation.
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