It's not clear cut:

https://news.ycombinator.com/item?id=15103654

https://www.newyorker.com/magazine/2017/08/21/is-there-any-p...

She places its start at the moment of a famous failure: the Mayday Vietnam protest of 1971, when twenty-five thousand people blockaded bridges and intersections around Washington, D.C. A manual describing the demonstration’s tactics allowed Nixon’s Attorney General to summon the police, the military, and the National Guard preëmptively. More than seven thousand protesters were arrested. Mary McGrory, a journalist who was sympathetic to the cause, described it as “the worst planned, worst executed, most slovenly, strident and obnoxious peace action ever committed.”

Kauffman disagrees. The spectre of the protest rattled the Administration, she points out. What’s more, it marked the shift toward the tactics-driven approach that we still follow today. “The last major national protest against the Vietnam War, Mayday was also a crucial first experiment with a new kind of radicalism,” she writes. It was less about moral leadership than about the fact of obstruction. It embraced whatever—and whoever—forced the hand of power. “You do the organizing,” the Mayday manual read. “This means no ‘movement generals’ making tactical decisions you have to carry out.”