3,5 stars
This is mostly an account of previous philosophers and how they dealt with one particular moral dilemma inherent in the human experience: the tension between obligations to our fellow citizens vs. obligations to all members of the human species. Linklater does a good job at presenting the various arguments and drawing out their subtleties. However, the book falls a bit flat when Linklater tries to articulate his own vision of how those tensions could be overcome. The last two chapters are very anticlimactic.
Nonetheless, it is still one of the few works that aims to apply political theory to the international realm and it remains a classic of international relations. It is well worth a read, especially with the recent surge in literature tackling the ethical conundrum of a world state as one way to overcome moral particularism.