[TaXaZ]

I think it BCZ actually doesn't stem from happiness or even lack of it (say hello to functioning unhappy parents). Children give strong "purpose" and hijack the dopamine circuitry which is the real driver behind human drive, evolutionary speaking (yes they also hijack some other circuitry as well, but the real drive is the dopamine system). TLDR, you're right, it works on another dimension which is even more fundamental than happiness dimension. The dopamine circuitry stems from lizard brain and quite old, evolutionary speaking.

[alexvoda]

Just a note, the Triune brain theory, implied by you saying "lizard brain", is not actually part of scientific consensus. It was incredibly popular (even being cited by Carl Sagan) and still retains a lot of popularity among the public, but it seems it is no longer regarded as factual.

https://journals.sagepub.com/doi/10.1177/0963721420917687

[TaXaZ]

First thanks for this read. But yes and no.

- Yes, bcz this reptile models is not accurate. It's at best an outdated but very intriguing analogy (which I agree can be misleading) but not here.

- No bcz a bit irrelevant to the our argument above. You may refer to [this paper](https://www.ncbi.nlm.nih.gov/books/NBK234157/) quoting:

> "The preponderance of the cerebral cortex (which, with its supporting structures, makes up approximately 80 percent of the brain's total volume) is actually a recent development in the course of evolution. The cortex contains the physical structures responsible for most of what we call ''brainwork": cognition, mental imagery, the highly sophisticated processing of visual information, and the ability to produce and understand language. But underneath this layer reside many other specialized structures that are essential for movement, consciousness, sexuality, the action of our five senses, and more—all equally valuable to human existence. Indeed, in strictly biological terms, these structures can claim priority over the cerebral cortex. In the growth of the individual embryo, as well as in evolutionary history, the brain develops roughly from the base of the skull up and outward. The human brain actually has its beginnings, in the four-week-old embryo, as a simple series of bulges at one end of the neural tube."

Despite what that paper says, the lizard analogy goes to this, and I agree it's loose, outdated and misleading one but doesn't change the argument we're discussing here.