It is well known that there are large differences in the per capita income levels of the world's states. While a few poor countries are catching up with the rich world, for some countries, the gaps are growing wider. Most of this global inequality isbetweencountries, notwithinthem. In other words, even if income were equalized within countries, a large part of the gap in average income levels between countries would remain.At the same time, the majority of movements in the wealthier countries (...) for greater distributive equality have tended to focus on inequalities within their own borders: on issues such as raising minimum wages, changing the domestic tax rate, and ending national health disparities. This state-centric focus is frequently justified in moral terms. It is a familiar claim, for example, that we have special obligations to our own citizens and that these obligations are both weightier and more extensive than our obligations to strangers outside our borders. (shrink)