Friedrich Hayek on how uniqueness allows for specialization and "a more successful use of the earth's resources"

It is... not simply more men, but more different men, which brings an increase in productivity.  Men have become powerful because they have become so different: new possibilities or specialisation - depending not so much on any increase in individual intelligence but on growing differentiation of individuals - provide the basis for a more successful use of the earth's resources.

~ Friedrich Hayek, The Fatal Conceit, Chapter 8: "The Extended Order and Population Growth"