The uneven development of capitalism gives us imperialism.
Capital always seeks the highest returns, wherever that may be.
The geographical mobility of money, commodities, production capital & labour power depend upon the creation of fixed & immobile physical & social infrastructures.
Overaccumulation at home can be relieved only if surplus money capital is sent abroad to create fresh productive forces.
The accumulation of capital is increase of the proletariat, & that means primitive accumulation of some sort.
There is no spatial fix that can contain the contradictions of capitalism in the long run.
The world was saved from the terrors of the great depression not by some glorious ‘new deal’ or the magic touch of Keynesian economics, but by the destruction & death of global war.