History shows that ‘security, whether defined narrowly or widely, is a scarce commodity’.1 Therefore, it is generally observed that in face of security threat perceptions, states feel the necessity to combine their efforts to strengthen their own security by acting together. This brings us to the concept of collective security, which has been widely debated in the literature of international relations, both in practice and in theory, during which scholars have attempted to provide several formulations to ensure collective security, in the context of international relations theory.