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Which is truer: A) Species with brains rarely become smarter over time, because their cognition is already optimized with regard to their body, senses, and environment: they wouldn't clearly benefit from a smarter brain (with higher resource consumption) (continued)
B) There are inherent, near-universal evolutionary advantages in being smarter, and as such, most species with a complex brain are becoming smarter over time. Also curious whether there's any evidence that wolves or giraffes or eagles are smarter today than 10M years ago...
I believe it's mostly A, and as such, intelligence increases happen under environmental change and require co-evolution of brain, body, and social structures. Many evolutionary coincidences were required to create the conditions for the development of human intelligence
Wouldn't a smarter brain make better decisions at any point in time, thus increasing the chance of survival, thus winning the Darwinian game? I also doubt optimizing brain circuitry would cost much more energy.
Yesterday, my son has gave me his thought and we were thinking ..., what if in our world and Universe greater things exist but we don’t see it because we don’t have such organ for perception.., he compared to an ant 
like they prob do not know that they live among giant humans
This is something I have always thought since I was a child. Our perception of what is reality is limited and relative- micro and macro are the same, just the scale varies- who knows cells, atoms, plants, rocks have an intricate universe of their own.
Have you watched a TED talk by Suzana Herculano regarding how important was fire to the development of human brain? https://www.ted.com/talks/suzana_herculano_houzel_what_is_so_special_about_the_human_brain …
A & B are not contradictary. Within a certain environment, a slightly smarter brain doesn't win the decisive advantage, and when the critical changes happen in the condition, the better brains win out and the species are not the one that used to be.
I read somewhere Koalas were more intelligent than now. They evolved to eat some kind of plant and stay on that plant like forever. Not needing to search for food made them less smart.
Actually, we are becoming less smart. https://www.discovermagazine.com/planet-earth/the-human-brain-has-been-getting-smaller-since-the-stone-age …
Yes our brains got smaller while we got much smarter - the increase derived from our ability to collaboratehttps://www.newscientist.com/article/2123837-sociable-woodpeckers-that-cooperate-have-evolved-smaller-brains/ …
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