De Castro, Renato Cruz2015-08-102015-08-10De Castro, Renato C. (2011) “Strengthening the US–Philippine Alliance,” ANU–MASI Policy Background Paper, No. 6, 30 November.http://hdl.handle.net/1885/14643How should the Philippines and the United States reconfigure their alliance to face the changing security challenges of the 21st century? This question of “alliance management” brings forth the challenge of how to maintain an alliance after the initial security threat that prompted its creation has been overcome, and the alliance’s underlying rationale cancelled. Alliance durability is the result of a number of factors. These include, for instance, a reformulation of threat perceptions as well as a process of institutionalization. In order to ascertain the viability of an alliance, such as that between the US and the Philippines, it is vital to understand how these factors have been operating.Copyright the author/s. Permission is freely given to publish this paper in its entirety or in part in any newspaper, wire service, internet network, newsletter or blog, provided that full credit is given to the author(s), the Department of International Relations (ANU), and the MacArthur Foundation. Kindly inform the editor (see paper) and provide details as to where and when the publication occurred.2011-11-06