For the record:

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https://extinctionrebellion.uk/the-truth/about-us/

9. We are a non-violent network

Using non-violent strategy and tactics as the most effective way to bring about change.

Non-violence keeps our movement alive. We use non-violence to reveal the true perpetrators of systemic violence that people suffer from daily all over this world. It is our strategy to bring light to the injustice that too many suffer each day. We feel pain from the abuses of the police and others, and we will keep exposing their violence through our discipline. Non-violence has unequivocally been demonstrated to be an effective tool in mass mobilisations (see the work of Gene Sharp and Erica Chenoweth) and so we base a cornerstone of our movement on this.

At the same time we also recognise that many people and movements in the world face death, displacement and abuse in defending what is theirs. We will not condemn those who justly defend their families and communities through the use of force, especially as we must also recognise that it is often our privilege which keeps us safe. We stand in solidarity with those whom have no such privilege to protect them and therefore must protect themselves through violent means; this does not mean we condone all violence, just that we understand in some cases it may be justified. Also we do not condemn other social and environmental movements that choose to damage property in order to protect themselves and nature, for example disabling a fracking rig or putting a detention centre out of action. Our network, however, will not undertake significant property damage because of risks to other participants by association.

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https://deepgreenresistance.net/resistance/liberals-radicals/nonviolence-nonviolent-direct-action/index.html (link not currently working on my computer, the following transcribed from the DGR book)

'Gene Sharp is the foremost scholar on nonviolent action. His three volume The Politics of Nonviolent Action should be required reading for all activists as a basic primer on the nature of political struggle. [...] Nonviolent direct action is a form of struggle which uses political, economic, or social leverage in an attempt to coerce the structures of power to change, up to and including complete abdication' (DGR book, p.104)

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Going further, with a distinction made between nonviolence and pacifism:

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'A personal commitment to the rejection of violence can be an honorable and thoughtful act. But if this commitment leads to an inability to face the realities of systems of power--their inherent violence, their intransigence, their sociopathic destruction of anyone and anything in their way--and what is involved in changing those systems, then the wholesale embrace of such pacifism will only impede our ability to win justice and save what's left of our planet.

Systems of power are not swayed by moral exhortation. They don' care how well-behaved you are, how much you believe in the power of healing, or how much you want the inner child of perpetrators and CEOs to feel the love they supposedly never got. Their inner children are sociopathic. And out in the real world, they will turn fire hoes and German shepherds on your actual children. Nonviolent actionists have been gunned down in cold blood, tortured, thrown in jail to rot. Any quick perusal of the history of political struggle will yield the harsh truth, the lesson learned from Bloody Sunday to Tiananmen Square: nonviolence does not work by persuasion, nor does it offer protection, and the left needs to give up its maudlin belief in both. Those are not the reasons to employ it.

Nonviolence works be facing the ruthless reality of oppression, identifying its linchpins, and using direct action to interrupt the flow of power and hopefully dislodge some portion of its foundation.' (p.106)

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No mention of the utility to empire of stoking nonviolent movements in other countries in order to destabilise and exploit the subsequent chaos to serve their own ends. Presumably this is why the author of these words, Lierre Keith (yes, I'm banging on about her again) was perfectly comfortable supporting an astro-turfed, Mossad-adjacent 'women's movement' in Iran shortly before that country was targeted by a merciless bombing campaign and regime-change operation, killing, maiming and otherwise ruining the lives of thousands of men, women & children. About which she said nothing: https://nitter.net/lierrekeith/search?f=tweets&q=iran&since=&until=&min_faves=

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