We are territorial creatures, just like chimpanzees, wolves, and tigers. We claim our territory and fight for it, and our genes, which require just such an exclusive claim over habitat if their replication is to be guaranteed, depend on our success. Yet when we fight it is, as a rule, in the name of some high ideal: justice, liberation, national sovereignty, even God Himself. Once again, it seems that we are in the habit of telling ourselves stories that make no reference to the biological realities in which they are rooted.
-Roger Scruton, On Human Nature