when you get enough people to agree to actually pack up their squeamishness concerning homicide to go through with calling it "manslaughter in self defence." At that point it becomes one of three things depending on who leads the charge: A civil war if the sycophants to the system have enough firepower to empower "loyalists" to fight for them, A Revolt if the people elevate one of their own, (most likely a leader in some grassroots org) or a Revolution if there are enough people already in power to rally the troops so-to-speak. It can morph to one of others others at any point though. Of the three, Revolutions tend to be the fastest if conducted surgically with some sort of Coup-d'etat scenario.

Idk, I'm personally not too concerned with what we call it as long as it happens.