Josiah Warren is widely regarded as the first American anarchist and the four-page weekly paper he edited during 1833, "The Peaceful Revolutionist", was the first anarchist periodical published. Warren, a follower of Robert Owen, joined Owen's community at New Harmony, Indiana. He coined the phrase "Cost the limit of price", with "cost" here referring not to monetary price paid but the labor one exerted to produce an item. Therefore, "proposed a system to pay people with certificates indicating how many hours of work they did. They could exchange the notes at local time stores for goods that took the same amount of time to produce". He put his theories to the test by establishing an experimental "labor for labor store" called the Cincinnati Time Store where trade was facilitated by notes backed by a promise to perform labor. The store proved successful and operated for three years, after which it was closed so that Warren could pursue establishing colonies based on mutualism. These included "Utopia" and "Modern Times". Warren said that Stephen Pearl Andrews' "The Science of Society", published in 1852, was the most lucid and complete exposition of Warren's own theories. For American anarchist historian Eunice Minette Schuster: "It is apparent ... that Proudhonian Anarchism was to be found in the United States at least as early as 1848 and that it was not conscious of its affinity to the Individualist Anarchism of Josiah Warren and Stephen Pearl Andrews ... William B. Greene presented this Proudhonian Mutualism in its purest and most systematic form".