"As capitalism and bourgeois society triumphed, the prospects of alternatives to it receded, in spite of the emergence of popular politics and labour movements. These prospects could hardly have seemed less promising in, say 1872–3. And yet within a very few years the future of the society that had triumphed so spectacularly once again seemed uncertain and obscure, and movements to replace it or to overthrow it had once again to be taken seriously. We must therefore consider these movements for radical social and political change as they existed in the third quarter of the nineteenth century."