Final answer:
Revolutionary movements seek to completely change every aspect of society without usually providing a plan for a new system, standing in contrast to reform movements, which aim to change specific social structures.
Step-by-step explanation:
The specific type of movements this question is referring to are called revolutionary movements. These movements seek to completely overturn and dismantle the current system but are often criticized for lacking concrete plans for a new social order post-revolution. Unlike reform movements which aim to change particular aspects of society, revolutionary movements like The Weather Underground or the Texas Secede! aspire to alter every aspect of society. Within the scope of social change, they represent one end of a spectrum, where the change sought is total, replacing existing structures and systems with something fundamentally different.
Another type of movement mentioned in the provided text are alternative movements, focused on self-improvement at an individual level. In contrast, social movements are broader, organized collective actions aimed at pushing for societal norm, belief, or value changes. Though the ultimate goals can be diverse, such movements play a crucial role in social change, offering an outlet for political expression outside formal institutions when other mechanisms of democracy are perceived as inadequate or unresponsive to the public's needs.