Nothing. People have done things for the world, Thomas Edison built this, Issac Newton discovered that, Gandi supported this, etc, etc but not an entire country.
Sure, the governments of these countries may have pitched in with some funding, groups of people may have teamed up, but never in the history of existence has every man, woman, and child of a society banded together to create this, help that, or the like. Hell, plenty of people in said country have probably opposed a lot of these things. Sure maybe a majority did pitch in, but there has always been someone at home not giving a fuck.
Sorry if I'm a bit off topic, I've just never been a fan of "Well our country created Z"
discussions.
Edit: Though just to play along...
On behalf of the Moon and it's inhabitants...me, I must explain to you that the Moon may have played a crucial part in the creation of life on Earth. Also it's gives man a goal, controls your tides, and is pretty to look at.