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he labels ‘therapeutic sceptics’, including my own work.

      0.3Wittgenstein, the Radical

      Wittgenstein’s way of philosophising represented a break with traditional ways of philosophising. Traditional philosophers thought of themselves as constructing metaphysical systems, or as adding to our stock of knowledge, or as doing something continuous with science. Wittgenstein presented us with a radically new way of doing philosophy.

      I will argue in this book that Wittgenstein’s radical philosophy could also be useful in developing the radical politics and social theory that we need around the world now. It is a mistake to view Wittgenstein’s philosophy as conservative and Marxist critics of Wittgenstein are wrong to think that there are deep tensions between Wittgensteinian philosophy and radical left-wing politics. We face enormous threats from climate change, rising authoritarianism, bigotry, and war. Wittgenstein’s philosophy is useful in challenging the dominant liberalism of today, which does not seem to be up to the task of rising to those challenges, and in developing a clearer, more radical alternative to it. It can help us to get clearer about the nature of disagreements, about what justice requires, and about the justifications given for various forms of society. Wittgenstein himself may not have been a radical in his politics but his philosophy can help radicals to get clearer in their political thought.