It doesn't have to be complicated. Some things are just common sense.

If it would pay to outsource your job to a low wage country, your job is in danger.

First it was textile workers to have their jobs outsourced. Then a load of other manufacturing jobs. Now its gotten to computer programmers! it's hard to say how it will all end.

Real wages of American wage earners will go down under globalization. How could they not go down?