In chemistry: Free Radicals are atomic or molecular species with unpaired electrons on an otherwise open shell configuration – usually highly reactive.
The Federalist conceives the possibility of a revolutionary process which is at once peaceful and legal.
Locke: Anyone who uses force without right – as everyone does in society who does it without law, puts himself into a state of war with those against whom he so uses it; A king may be resisted when he exceeds his authority and uses power unlawfully.
It is not the people who rebel; rather it is they who put down the sedition of the tyrant. A right to resistance.
Declaration of Independence says we have the right to rebel. You can not overthrow the Constitution.
Revolution is abrupt. It can occur in either direction, against the tide as well as with it. Action and reason can be equal and opposite in physical motion so in social change revolution and counter-revolution can aim in opposite directions.
The revolutionist is a radical.
Marx: Political power is merely the organized power of one class for oppressing another.