You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
The US has almost always been known as a "nation of immigrants" however prior to the 1960's those immigrants were primarily from Europe.
What if from the time of the founding fathers or a little afterwards the US truly did open itself up and encourage the immigration of people's from all corners of the world. What kind of US could we have seen?
Certainly a bigger population entering the 20th century.