The entire world would have actually been better off if the Canadian residential schools had never existed. Not only did those things create an entire generation of people who had their cultural knowledge beaten and abused out of them, but it also created a generation of people who had no idea how to function outside of the reserves. In short, by the time they got out of the residential schools, they couldn't function within the reserves (due to having their culture, beliefs, and cultural history forcibly removed from their field of learning) and they couldn't function outside them. This led to residential school "graduates" having virtually nothing in the way of honest opportunity, causing many to turn to crime, drugs, and alcohol.
The residential schools were actually so effective, that Nazi Germany used them and the methods used in them as a base model for their concentration camps, effectively making the residential schools one of the most evil things that have ever been created.