I disagree. Without significant advances in STEM the last 200 years would be pretty much identical to the 200 years before them, and another 200 before them, etc.
Same applies to coordinated protest activities.
One of the big differences at the time was the use of "repeaters" by the North. Having a gun that can shoot again quickly when the other side cannot is a huge advantage.
With the North winning the Civil War, they put both Reconstruction and the 15th Amendment in place, causing Blacks to have the right to vote (of course many people tried to thwart that law for almost a century).
[0] - https://www.history.com/topics/american-civil-war/civil-war-...