If we're into considering a more expanded Patriotism, why be parochial and stop at the Earth? Chesterton suggested we think of the universe in that way.

"My acceptance of the universe is not optimism, it is more like patriotism. It is a matter of primal loyalty. The world...is the fortress of our family, with the flag flying on the turret, and the more miserable it is the less we should leave it...When you do love a thing, its gladness is a reason for loving it, and its sadness a reason for loving it more."

(That comes from The Flag of the World, a chapter in a book called Orthodoxy. Contains lots of thought about "patriotism" worth mulling over.)