it might indeed be that a "world government" would've problems with minorities, but imo this government is simply not realistic as long as there are cultural diversities which lead into this conflict.

another thought: in a book i read recently ("die saga der sieben sonnen"), all world religions are mingled to one single big religion called the "unisono", combining both christian with the jewish, the nature and the arabian/asian religions. but that's definately that much unrealistic and won't happen in a thousand years. the churches are still too strong, allthough there is already such a movement (ecumeny), which is - i hate to say that - a very bad idea, since it's not - as intended - bringing together different religions but combines them to one mixture of hypocrite antitheses. sorry for these harsh words. but isn't the church an institution to represent its religion? i don't want them to battle for their disciples, but to send their message out so everybody can evaluate the truth. we can't when we're overwhelmed by blindfolded statements.