A key early socialist theorist of political economy was Pierre-Joseph Proudhon. He was the most well-known of nineteenth century mutualist theorists and the first thinker to refer to himself as an anarchist. Others were: Technocrats like Henri de Saint-Simon, agrarian radicals like Thomas Spence, William Ogilvie and William Cobbett; anti-capitalists like Thomas Hodgskin; communitarian and utopian socialists like Robert Owen, William Thompson and Charles Fourier; anti-market socialists like John Gray and John Francis Bray; the Christian mutualist William Batchelder Greene; as well as the theorists of the Chartist movement and early proponents of syndicalism.[14]