The Berlin Social Research Center hosted a conference on "Cosmopolitan Conditions for Legitimate Sovereignty" on July 12-13, 2013.
Five papers presented at the conference are available here.
Mathias Risse (Cambridge, USA)
"Introducing Pluralist Internationalism – An Alternative Approach to Questions of Global Justice" [pdf]
Andrea Sangiovanni (London)
"Should We Take Institutions As They Are, or As They Ideally Ought To Be?"
Kai Moller (London)
"From Constitutional to International Human Rights"
George Pavlakos (Antwerp/Glasgow)
"On The Monist Structure of Legal Obligations"
Mattias Kumm (Berlin/New York)
"Global Constitutionalism and the Cosmopolitan State" [pdf]