Everything. IT has affected everything. People communicate between Nations at the speed of electricity, almost for free. Do you remember when long distance phone calls were astronomical in cost? Rarely, except for the very wealthy, did people from other nations communicate with each other. Now they do it all the time! Many people on this thread are in different countries! This sort of communication, of course, makes mass migration, not only possible, but much easier. But migration is driven by a very basic thing, people are unable to survive where they are. There are also, many factors fueling this: war, climate change, political instability. IT factors into all. The Arab Spring was organized via social media. Someone told me, and I haven’t verified if it’s true, that the current civil war in Syria began, at least in part, because of internet access.