At the end of the day, we're all humans. We share the same basic biological imperatives, which tend to manifest in similar ways. However, while we may share many aspirations, we often disagree on how to achieve them or what defines "the good life." These differences are not easily painted over, despite the globalization of capital and the exporting of American media. The great middle of America wants to share a one-world society as much as does the common person from Germany or Iraq or Botswana, ie not very much.
Eliminating prejudice, intolerance, and conflict is critical, but if you think this will occur by breaking down borders, then you're hopelessly idealistic and naive. If you think borders are imaginary lines on a map, then you fundamentally misunderstand the nature of government and its outgrowth from and representation of a unique culture or collective group of cultures forming a singly society. Different groups always have been and always will be different; it's the responsibility of civilized people not to pretend like these differences don't exist, but to find a way to cooperate with others despite them.
Unfortunately, if Gene Roddenberry's vision is to ever come true, humanity has to first face a catastrophic WWIII before humanity achieves greatness.
