Extinction Rebellion (abbreviated as XR) is a global environmental movement with the stated aim of using nonviolent civil disobedience to compel government action to avoid tipping points in the climate system, biodiversity loss, and the risk of social and ecological collapse.
Extinction Rebellion was established in the United Kingdom in May 2018 with about one hundred academics signing a call to action in support in October 2018. At the end of that month, XR was launched by Roger Hallam and Gail Bradbrook, along with other activists from the campaign group Rising Up!. In November 2018, five bridges across the River Thames in London were blockaded as a protest. In April 2019, Extinction Rebellion occupied five prominent sites in central London: Piccadilly Circus, Oxford Circus, Marble Arch, Waterloo Bridge, and the area around Parliament Square.