Most analyses of conflict assume that conflicting groups act in a unitary fashion. This assumption is often violated: to reduce their risk of replacement, group leaders prevent both group members and soldiers from acting collectively, making it difficult for leaders to make credible commitments...

Defence is the ultimate public good, and it thus falls to government to determine the appropriate amount of public revenue to commit to the defence of the realm. This will depend on history, strategic threat, international security obligations, entreaties from allies and, of course, the threat...

1. Introduction -- 2. A Snapshot of Space: 2018 -- 3. The Business of Space -- 4. Europe in Space and the Space in Europe: A Complex Relationship -- 5. Beyond Europe: Space Powers Around the World -- 6. Space Diplomacy: Traditional and Non-traditional Security Issues -- 7. The Legal Dimensions...