In the past couple decades, prominent philosophers and social critics such as Peter Singer and Jeremy Rifkin have forcefully argued that humans must work to discard traditionally narrow, tribal thinking and extend their moral concerns to humans beyond just family, friends, and neighbors (as well as non-human animals).  For example, Singer writes in his book “The Expanding Circle”: “If I have seen … that from an ethical point of view I am just one person among the many in my society, and my interests are no more important, from the point of view of the whole, than the similar interests of others within my society, I am ready to see that, from a still larger point of view, my society is just one among…