Algeria and Spain have decided to jointly promote a process, in association with the countries of the 5+5 Dialogue, to develop a water strategy for the western Mediterranean basin (WSWM). The aim of this strategy is to promote sustainable water use at local, regional and national levels, through the adoption of cross-cutting goals, management criteria and operational objectives, in order to harmonise water policies in the Mediterranean. Spain and Algeria are actively involved in the peaceful resolution of international conflicts and hope this strategy may constitute a tool of preventive diplomacy, contributing to maintaining international peace and security by facilitating international cooperation on water issues.