Luis Cabrera 
Political Theory of Global Justice [PDF ebook] 
A Cosmopolitan Case for the World State

Could global government be the answer to global poverty and starvation?Cosmopolitan thinkers challenge the widely held belief that we owe more to our co-citizens than to those in other countries. This book offers a moral argument for world government, claiming that not only do we have strong obligations to people elsewhere, but that accountable integration among nation-states will help ensure that all persons can lead a decent life.Cabrera considers both the views of those political philosophers who say we have much stronger obligations to help our co-citizens than foreigners and those cosmopolitans who say our duties are equally strong to each but resist restructuring.