My personal experience is quite the opposite - globalization allows capital to move to the lesser developed and cheaper places, bringing jobs and education, and over time an improved quality of life, so that people who were before desperate to leave no longer feel it’s necessary. Sure, it’s not as simple, but just wanted to mention it, since it’s not as straightforward as it seems.

On a slightly related note, I’d rather point the finger at urbanization - in my short lifetime I’ve witnessed multiple small villages (1.5 - 2k population) pretty much disappear as the younger generation moved out for multiple different reasons.