State-centric security and human security

What is the difference between the Security Council and the General Assembly (main functions, composition, how does each organ make decisions) Define international law and explain the main sources of international law that is the difference between traditional, state-centric security and human security. Explain the difference between horizontal and vertical proliferation and what this difference implies if the international community wants to prevent it. Explain how IGOs are involved in making international law (e.g. what does the UN say about the use of force)