No matter how one sees the ideal liberal world, there will always be differences in size between the sovereign entities on the globe. Even in an anarcho-capitalist world there will be different sizes of the communities that people voluntarily form, although they will of course lack sovereignty in any external legal meaning we now associate with the term. So the question is: does size matter in international relations?

There are many answers to this, and I will be unable to provide them all here (or elsewhere, for that matter). There are instances where size,  measured in number of inhabitants of a particular state, does not matter at all. Trade is probably the most important one. After all, it is not countries that trade but people, and if the trade is free, the nationality or location of the traders is of no importance whatsoever. This more or less still applies to…