This new textbook outlines the main theories and concepts from a variety of disciplines that support homeland security operations, structures and strategies.

1. Introduction to Security Theory James Ramsay, Keith Cozine, and John Comiskey 2. Risk Assessment and the Homeland Security Enterprise Brian Harte 3. The Sociology of Security Terrence O'Sullivan 4. Crime and Security Chelsea A. Binns 5. Terrorism: Origins, Ideologies, and Goals Kyle W. McDonnell and Keith Cozine 6. Interagency Collaboration John Comiskey 7. Emergency Management - Theories of Preparedness, Mitigation, Response, and Recovery Irmak Renda-Tanali 8. Global Governance and the Relationships Between Nations Keith Cozine 9. Intelligence and the Theory of Preventive Action Erik J. Dahl 10. Human and Environmental Security Theory James D. Ramsay 11. Public Health Security Terrence M. O'Sullivan and James D. Ramsay 12. Homeland Security Law and Policy Theory Michael McDaniel 13. Cybersecurity Policy and Theory Maeve Dion 14. Theoretical Underpinnings of Homeland Security Technology Michael D. Larrañaga and Patrick K. Smith