[ma2rten]

I also hold three passports. I think that having multiple nationalities does make you see how arbitrary the concept of a nation state is (getting privileges solely because of your place of birth or who your parents are), however I don't see that changing anytime soon, because there is not really a realistic alternative.

EDIT: In case people are interested, my nationalities are: Dutch, German, Canadian. I was born with all three of them (even though I found out only much later). I would loose both my Dutch and my German citizenship if I were to acquire another one.