The Biggest Immigration Wave in US History Had Huge Economic Benefits, Study Shows

Carly Cassella, Science Alert, Mar. 18, 2019

"Over a hundred years ago, from 1850 to 1920, the United States of America experienced a wave of mass migration like never before - the highest levels in its history. While the topic of immigration remains a divisive issue to this day, we now have some interesting evidence to add to the mix. A new study has found that US counties with more historical immigration enjoy better economies."