This volume presents the evolution of the field of foreign policy analysis and explains the theories that have structured this field of research over the last 50 years. It provides the essentials of foreign policy analysis and is designed to be a key entry point for graduate students, upper-level undergraduates and scholars into the discipline of foreign policy analysis. The book features case study analyses and definitions along with prevalent theories and debates and reviews various models of analysis such as two-level game analysis, bureaucratic politics, strategic culture, cybernetics, discursive institutionalism, poliheuristic analysis, cognitive mapping, gender studies, groupthink and the systemic sources of foreign policy. It also clarifies conceptual notions such as doctrines, ideologies and national interest.