No Country on earth is in the same league as the U.S. when it comes to the quantity of immigrants who have come here and the quality of their contributions. But lately, in our generally sour mood, Americans have been questioning the benefits of immigration. Many worry that today’s immigrants differ from those of the past: less ambitious, less skilled, less willing and able to assimilate.

The conventional picture is of an unstoppable wave of unskilled, mostly Spanish-speaking workers