The summer of 2020 was not the first time activists marched in the streets of major U.S. cities, expressing their outrage over high-profile episodes of police brutality and demanding an end to racial inequities. Nor was it the first time that protesters pushed to reform police tactics or remove monuments to Confederate war heroes. Black Lives Matter—as a rallying cry and as an organization—had been around for years.
source https://phys.org/news/2021-01-discusses-social-movements.html
