Human capacity for empathy is an evolutionary advantage. When we take care of old or sick individuals (resource permitting) we keep their knowledge base in the group. We also can expect that others will take care of us, which give us more incentive to care for others and strengthen the community itself.
Eventually we benefit from it in our old age and teach our grandkids to remember about it as they get older.
Eventually we benefit from it in our old age and teach our grandkids to remember about it as they get older.