Paul Rosenberg (in 2015)

So, the truth is that war is not pointless… it’s only pointless from the standpoint of the poor slob who has to suffer and die in it.  For the ruler, war has a clear and compelling purpose: it gets rid of competitors.

States fight. That is as accurate as any statement of history that can be found. It was true 6,000 years ago and it is true now. Conflict is part of the core nature of states; they compete like animals over limited territories. Thus, war serves them.