As we can know from the bombing on Afghanistan, USA, the most powerful country in the world, does not respect the United Nations. We can say that the respect for United Nations is the first step to the world democracy.

The basic benefits from the World Government are as follows.
1. World Government can reduce or prevent the war and so the destruction by war is reduced or prevented.
2. World Government can reduce the military expenditure.
3. Fluctuation of exchange rate will be removed because the World Central Bank will issue the international common currency.
Therefore, establishing the World Government is a political policy but, at the same time, it is the most effective economic policy. Especially, these benefits are important for developing countries.