At some point in human history, it was suggested - perhaps by a religious leader - that conflict is the source of all human suffering, and suffering can be taken away. When people pointed out the obvious inevitability of disease and death, this leader quickly spoke of the more important things, like an afterlife and moral behavior that is more important than survival itself. These grand emotional symbols took some time to sink in.
When they did, people formed a class of the politically active now called "liberals." Liberals believed in equality, in unity, in compassion and in raising up the downtrodden impoverished, racially discriminated against, gender-unequal and socially rejected. In exchange for doing this, liberals got to feel as if they were morally more important than the divisions of life itself between those who could do and those who could not.
After WWII, America and the Soviet Union tussled for control of large chunks of the world. At some point, the Soviets became corrupted by the depressing nature of egalitarian communism and power-hungry forces from within, causing their system to collapse and vaulting Americans to the top spot in the human power chain. Being of a fundamentally liberal nature on social policy, but a conservative nature in economics, Americans began to create an environment friendly for American corporations to go multinational.
Because this new arrangement would be a new form of colonialism, and because colonialism had created such a disaster none wanted to revisit it, the process of exporting raw materials from the third world to the first had to be dressed up in a "positive" form that all the television-fed sheep would find rewarded their sense of self image. As a result the current age takes the yearning of the last age, for a world without a constant threat of nuclear conflict from its partisanship, into unipartisan government.
The problems with this are manifold. First, it will contribute to the utter destruction of the environment, as this centralized government will like America before it make token concessions every year without addressing the real problem. Second, it will strengthen corporations across continents and in every voting market possible, causing them to be more powerful than ever before. Third, it will standardize cultures, languages, medias and heritage across the globe, normalizing humanity into a conformity to an average.
While the mythos of globalism and a peaceful world under one government seems appealing, it is this emotional appeal that is a hallmark of social manipulation for the further profits of those who recognize the rules are fake and act accordingly. A more sensible world order would allow local governments to decide whether or not they want to participate in Colonialism II without the presence of a superpower breathing down their necks. Whether this will be acceptable to the masses looking for an ego-boost remains to be seen.