I am from Brazil, from what I heard unions in Brazil, US and Europe all work wildly differently from each other. In US in particular unions seemly often have p

I am from Brazil, from what I heard unions in Brazil, US and Europe all work wildly differently from each other. In US in particular unions seemly often have power not only to defend workers but also to define workplace rules and even to veto decisions of the CEO of the company and whatnot. Also in US unions were first born in a extremely violent manner, with both sides actually killing each other, and the culture there is thus much more antagonistic, unions and companies are perceived as literal enemies, where even violence is actually possible (not that people would use violence currently but people might not forget violence of the past). From what I heard European unions have a more "cooperative" relationship with the company.