It's a question of how much violence. All dispute resolutions involve some form of it, telling one person they're not going to get what they want is absolutely

It's a question of how much violence. All dispute resolutions involve some form of it, telling one person they're not going to get what they want is absolutely a form of violence. But the violence needs to be managed, legible, and appropriate. Slavery regimes are best eliminated through compensation of the owners. The progress difference between the Dominican Republic and Haiti is directly attributable to the fact that while the Dominican Republic saw a managed transition away from slavery, Haiti saw the entire economy crumble in a revolution modeled after the French one. It's where you start thinking "this needs to be solved, right now," that leads to senseless, irrational violence. Hang back, spend some time understanding the problem, its economics, its politics. Take action to remove the worst excesses and slowly dig the problem out in detail. There's way more historical examples of well-meaning zealotry causing more problems than it solves than there are examples of zealotry preventing bigger problems from coming to pass.