Zeynep Tufekci captured this dynamic well in her book Twitter and Tear Gas: https://www.twitterandteargas.org/downloads/twitter-and-tear-gas-by-zeynep-tufekci.pdf [PDF!]
If We Burn by Vincent Bevins seems to capture it in even more depth, but I have only read reviews: https://newrepublic.com/article/175314/decade-mass-protest-mass-disappointment