Throughout history non violent protest have effectively worked. In modern times non violent protest haven't turned out with the same result and have not been so successful. For example the Cherokee American removal, Freedom Rides, UC Davis protest, and Gandhi's protest all didn't turn out successful. Unlike those peaceful protest the Rosa Parks boycott turned out well.
In 1838 and 1839 the United States forced the Cherokee Indians off their land. They Indians has gave up more than half their land to the the