42 Pages Posted: 13 May 2004
Date Written: April 2004
The laws of war forbid states to use force against each other except in self-defense or with the authorization of the United Nations Security Council. Self-defense is usually understood to mean self-defense against an imminent threat. We model the decision of states to use force against "rogue" states, and argue that under certain conditions it may be proper to expand the self-defense exception to preemptive self-defense. We also consider related issues such as humanitarian intervention, collective security, and the role of the Security Council.
Keywords: laws of war, United Nations
Suggested Citation: Suggested Citation
Posner, Eric A. and Sykes, Alan O., Optimal War and Jus Ad Bellum (April 2004). U Chicago Law & Economics, Olin Working Paper No. 211; U of Chicago, Public Law Working Paper No. 63. Available at SSRN: https://ssrn.com/abstract=546104 or http://dx.doi.org/10.2139/ssrn.546104