Now allow me to be more specific!
Let's say we start a revolutionary movement in the US, skirk, and we call it Al-Titty, and it becomes popular because everyone wants some titty, then we get change because we completely change the system. Now say, in another hypothetical situation, there is no revolutionary movement popular enough to change the system, then the system collapses anyway and change happens anyway. It's just that in scenario two we are even less sure of what's going to happen. Certainly, scenario one does not mean we're going to get everything we want or that it would objectively be better than what we have now, especially if the same upper class manages to control that revolutionary movement (an upper class which is divided, according to Wallerstein into three groups; i can go into more detail here if you'd like).
This of course is without mentioning that revolutionary movements are not necessarily explicitly political nor do they have to be violent. Though i can only imagine that, revolutionary movements or not, the transistion from capistalist world system would be as violent as capitalism itself. Especially considering that the top groups vying for power seem to be: A- cannibalizing eachother, metaphorically of course, and that B- the three groups are locked into a zero sum game.
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