Caesarian births directly affecting human evolution

[Anomalocaris]

The apparently increasing prevalence of caring behavior for the incapacitated as humans evolved  suggested whether that particular band survived is a mere quibble.  That trait, survived and prospered.

I'm not convinced that it is a "trait" as much as a cultural phenomena which was itself an outgrowth of the development of language/symbolic thinking.  Again, where else does that appear in the natural world?  In this humans are quite unique... not because of some stupid god story!

I am not sure we are that unique.  When you break it down, what we do is we tend to conduct ourselves towards crippled or dead members of social group that appear to damage the interests of the living members.   Elephants seem to exhibit similar behavior over crippled or dead herd mates that couldn't possibly contribute to the survival of the living members.  But the key thing is evolution does not act right off the bat with surgical precision.  The behavior in question may well have considerable benefit when undertaken upon living members of the social group who would soon fully recover.  However evolution is not so precise as to immediate confer upon us the instinctive ability to recognize the boundaries of where such behavior stops being advantageous.

So we gained the instinct to care for the crippled regardless of whether they would soon fully recover.  Natural selection would then weigh the overall consequences to determine whether the harm in caring for the permanently crippled outweigh the benefit of caring for the soon to recover.   If it does, then there might be strong selection pressure to terminate the gene for this behavior, or force modification of the gene to also confer the instincts to more sharply delineate where and when such behavior manifest itself.    Iffy does not, then there is less pressure to refine the precision of the this behavior.