Quadragesimo Anno §108

¹⁰⁸ This accumulation of might and of power generates in turn three kinds of conflict. First, there is the struggle for economic supremacy itself; then there is the bitter fight to gain supremacy over the State in order to use in economic struggles its resources and authority; finally there is conflict between States themselves, not only because countries employ their power and shape their policies to promote every economic advantage of their citizens, but also because they seek to decide political controversies that arise among nations through the use of their economic supremacy and strength.