All nationalists should have a basic grasp of the concept of Hamilton's rule, which states that relatives are worth helping in direct proportion to their blood relatedness - and which is the basis of "kin selection".
This is today accepted as being as fundamental to an understanding of evolutionary biology as Newton's laws of motion are to physics.
But while such instincts are quite straight-forward in wild animals, they become warped and confused in the case of domesticated animals and humans.
Richard Dawkins says that genuine altruism towards non-kin is a misfiring of a genetic urge to help bodies that contain a high proportion of our own alleles. Hamilton's rule implies that such misfiring (insufficiently discriminating altruism) on a large scale will cause the very allele for altruism itself to be phased out of the gene pool - and make it genetically advantageous to be an exploiter of others' generosity until such "goodness" disappears as a trait in the population.
Is this happening to humanity? And is this compounded by the discovery that increasing genetic diversity in a population causes altruism to become proportionately less common? (Professor Putnam).