Inasmuch as society cannot go on without discipline of some kind, men were constrained, in the absence of any other form of discipline, to turn to discipline of the military type.
Anyone who has lost track of time when using a computer knows the propensity to dream, the urge to make dreams come true and the tendency to miss lunch.
Our most basic common link is that we all inhabit this planet. We all breathe the same air. We all cherish our children's future. And we are all mortal.