Is reform of the UN Security Council necessary to ensure the UN performs its mission of maintaining international peace and security ?

Is reform of the UN Security Council necessary to ensure the UN performs its mission of maintaining international peace and security?

In answering either of the above question you should look to provide:

Sound indications of theoretical awareness (realism, liberalism, constructivism)
Solid empirical-based evidence (through selected case-study material)
An appreciation of ideas (key ideational perspectives) and their origins (with respect to certain thinkers, points in history) 18
An understanding of events that have most affected and shaped the League of Nations and the United Nations
Some comparative observations of the two organisations in question