So you regard social events - the First World War, for instance; or the transformation in so many parts of the world from pastoralist and peasant economies to industrial market economies - as having no objective causes?
Because their causes are not amenable to measurement. Yet these things seem to have happened, and to have impacted the lives of billions of people!
What are you measuring? Lives improved, lives lost? Technological advancement? Because for the former, obviously many lives were lost during WW I or II. But it was a real boon to technological advancement.
That, and war has nothing to do with quality. It's apples and used athletic socks.