CEVAP:

Realism argue that organizations are a result of States’ seek of security. They, as the main if not the sole actor of international relations, simply want to maximise their interests and survive in a world of homo homini lupus. As this cannot be ensured individually particularly in certain regions, States do and should be part of institutional military alliances against common enemies. Although convening under an umbrella organization usually led by powerful allies would mean some sort of dependency, the sense of security and protection obtained worth it. This is simply because of the fact that self-interest compels collective acts.