Answer:
revolutionary movement (or revolutionary social movement) is a specific type of social movement dedicated to carrying out a revolution. Charles Tilly defines it as "a social movement advancing exclusive competing claims to control of the state, or some segment of it".[1] Jeff Goodwin and James M. Jasper define it more simply (and consistently with other works[2][need quotation to verify]) as "a social movement that seeks, as minimum, to overthrow the government or state".[3]
A social movement may want to make various reforms and to gain some control of the state, but as long as they do not aim for an exclusive control, its members are not revolutionary.[4] Social movements may become more radical and revolutionary, or vice versa - revolutionary movements can scale down their demands and agree to share powers with others, becoming a run-of-the-mill political party.[4]
nullification rather than support secession
The main advantage that the South had at the beginning of the war was its large army and well-trained generals. The Confederacy, from this perspective, appeared more capable of winning the war at the beginning of the conflict. Moreover, as most of the fighting was carried out in the South, they also had the advantage of knowing the territory.
I do not think that the South failed to exploit its initial advantages. The Confederacy fought extremely well during the early stages of the war. However, the North's advantages were finally just greater. The South relied on agriculture, which was rendered unviable during the war. Moreover, it had a much smaller population, and its workforce was destroyed after emancipation. All of these put the Confederacy in a particularly difficult position.