Granted there has always been business conducted in other countries but in the past the advantages of doing so were not so great as recently. There was more protection for indigenous industries in the form of tariffs and other punitive measures that made off shoring en mass a lot less attractive than today. A free trade global economy changed all that. China has very smartly taken advantage of this. None of this happened overnight but over a course of at least the last 20 years so nobody paid any attention till the next to last horse left the barn. Where do you keep getting the money to consume goods if a huge chunk of good paying jobs are gone.
Bob