I've seen TV program saying "Globalization caused the latest or modern culture we can see in the big cities around the world. But, at the same time, it brought poverty to people living in rural areas. They envy richness filled in cities ,and move to cities. After all, they can't find job in cities and become homeless. And then, there would be less safety in those cities."
In this statement, rural people move to cities just because of their choice.
But, the tribe referred in this article doesn't have a choice because there is less source of food around their resident area. So, the problem is more serious than globalization.