While many scholars have analysed the impact of culture, beliefs and norms on foreign policy, few have connected domestic political identities to international politics. This thesis makes this agenda explicit by showing how domestic policy sources directly impact upon a state’s external security policies. Rather than focusing on material factors (such as military expenditure or economic growth), I instead combine work concerned with constructed identities in international relations with accounts from social psychology of how identities develop and evolve over time. Relying upon empirical evidence from party documents and extensive interviews with over 60 members of India’s security community, this PhD thesis investigates how the ide...