One of the best things about space exploration is the fact that it's pretty much financially and logistically impossible for any one nation to do it alone. Space has been one of the best sources for global unification over the past 20 years or so.
Mr. Carl Sagan said it best, "The old appeals to racial, sexual, religious chauvinism and to rabid nationalist fervor are beginning not to work. A new consciousness is developing which sees the earth as a single organism and recognizes that an organism at war with itself is doomed. We are one planet. One of the great revelations of the age of space exploration is the image of the earth finite and lonely, somehow vulnerable, bearing the entire human species through the oceans of space and time."