Political revolutions, for example, take place when an old order breaks down and this happens when enough people no longer feel compelled to follow the rules of the old authorities, when the old authorities no longer seem legitimate
This correlates extremely well with this current year and the social/political movements initiated. People disagree with the people in power and how previous orders have been carried out ( police brutality). These orders lose their legitimacy when its putting the public in harm and "ethically wrong" and riots and movements towards change occur.