The Tenth World Wilderness Congress (WILD10) met in Salamanca, Spain in 2013. The symposium on science and stewardship to protect and sustain wilderness values was the largest of multiple symposia held in conjunction with the Congress. This symposium was organized and sponsored by the Aldo Leopold Wilderness Research Institute, the Wildland Research Institute of the University of Leeds, CzechGlobe - Global Change Research Centre, and the WILD Foundation. The papers contained in these proceedings were generated at this symposium, but not all authors submitted papers for consideration for inclusion in these proceedings. They have been organized into four major sections: (1) Europe: Intervention and Nonintervention to Meet Protection Goals, (2) Australia and Antarctica: Geography of Place and Spirit in The Big Wild, (3) Africa and North America: Linkages Across Boundaries to Protect Nature, and (4) Old World and New World: The Relationships Between Wilderness, Human Health and Culture. Included are papers that address wildland issues on all continents, but wilderness designation, protection and restoration processes and challenges vary tremendously from North America to Europe and from Antarctica to Africa, thus sections are defined by geography and topic.