And the reasons for this are increasingly clear. In a globalized world, you need large-scale organizations to compete. Smaller nations are increasingly forced to become highly specialized in a few specific industries, often where companies are sold to major firms from allied countries (large parts of europe or israel, singapore), or you end up with individual companies constituting a significant portion of the national GDP (korea).

The way in which the US is able to weld such power on the world stage, especially with the rise of China is we don't constantly break up every rising business.