Who are America’s immigrants? What countries did they come from and when?
This post will get you into a higher level of knowledge about America’s immigration history.
There’s a brief story and comments at Zerohedge.
The story includes this video which has a very impressive animated map of immigration into the U.S.
The Zerohedge comment that sticks in my mind is the observation that the first wave of immigrants came for opportunity, but the latest wave came to parasite off the host.