Global trade drove the cost of supplies and goods down to the lowest available prices, so while setting tariffs may encourage local production because it makes overseas less attractive, the price of goods still goes up on both scenarios.

If moved locally, there will be more local labor required for production but it's not clear if that is a net benefit.

Hypothetically under globalism more developed countries shed their "dirty manufacturing labor jobs" and move more people upmarket. Of course this is matter of nonstop debate among economists because as we all know the whole population of a country can't move upmarket together and a lot of people were/are screwed because of lack of education and opportunity to develop themselves.

In an ideal implemention of this, more people would be moving to the arts, self expression, and technology, while fewer are involved in survival activities like shelter and food.

I think the unsolved problem now is that average people believe way too much of that wealth went to the top while the middle class is working harder than ever and getting less.