[doron]

I wonder how the graph will continue if we add one possible scenario.

That the war on terror will last for decades to come, escalating conflicts in other locations, say Pakistan or somewhere in the gulf (again)

World wide war without end.. The assertion that the war in Afghanistan is winding down, doesn't strike me as accurate.

In addition the period after the second world war, was marked by a US economic dominance, as Europe was in ruins and the soviet block stifled economic development in almost half the globe for several decades including the Vietnam period until glasnost started to get a footing (in that curious uptick around 1988 perhaps), right till the fall of the Berlin wall.

Things are different now. slightly.