Based on an analysis of u. s. social protest groups (ranging from labor unions to peace movements) between 1800 to 1945, one study concluded that strongly influence its chances of success.

I believe the answer is: the organization and tactics of a movement

The organizations that use violence as a tactic to grab attention tend to be negatively perceived by people and had lower chance of success.
The organizations that use non-violence tactic on the other hand, had a higher chance of success since they make it easier for people to listen to their perspective.

False it it a lot