Is multilateralism still viable today?

After WWII, various multilateral organizations have been promoted by the US and implemented through many international organizations such as the UN, the GATT and the IMF. Overtime, multilateral co-operation dramatically developed in different forms (Summits, Conferences, etc). However, critics of international organizations point to the unilateral tendency of American foreign policy. Therefore the pertinent question has to be asked: Are international relations today governed by multilateralism? However, it must be asserted that if multilateralism undergoes a crisis today, unilateralism is nevertheless not viable in a global world

[...] Nevertheless, multilateralism remains present and viable in the long term in a global world 1. Unilateralism is not viable in an interdependent and multipolar world Unilateralism could be possible in a unipolar world, in which a superpower would have unlimited military and economic resources. In reality, many arguments show that new poles and resistances to such a superpower are building up. a. The arguments against the idea of an unipolar world (M. Rogalski) According to Michel Rogalski, director of the Recherches Internationales review, new poles are emerging in world politics today. [...]

[...] Petiteville) The WTO doesn’t totally fulfill the conditions of an optimal vision of multilateralism for 3 reasons: First, the principle of equality between states is less of a reality in practice. Second, it is an organization that consolidates intergovernmental agreements. Finally, the unpredictability of the negotiations were highlight in the failures of negotiations in Seattle or Cancun. b. The international organization, instruments that serve powerful states? Power of the Council of Security in the UN The Council of Security in the UN is ruled by only 5 countries but holds alone the power, the Assembly can only make recommendations. [...]