Street events are rituals of release. Parades, bank robberies, fires and sonic explosions focus street attention. A crowd is an audience for an event. Release of crowd spirit can accomplish social facts. Riots are a reaction to police theater.
People fill the street to express special public feelings and hold human communion.
The alternative to death is a joyous funeral in company with the living. Industrialization was a battle with 19th-century ecology to win breakfast at the cost of smog and insanity. Wars against ecology are suicidal. The U.S. standard of living is a bourgeois baby blanket for executives who scream in their sleep. No Pleistocene swamp could match the pestilential horror of modern urban sewage.