Silliman was Maclure’s colleague and published much of his geological research. Maclure had visited Pestalozzi, whose ideas he admired, in Switzerland, but failed to persuade him to move to the U.S; Neef, who had worked with Pestalozzi, was enticed to emigrate. Maclure visited Owen at New Lanark; the experimental community at New Harmony was inspired by Owen, although he and Maclure argued over the practical application of utopian philosophies. Say, who had accompanied Maclure on a previous geological expedition, joined in this failed attempt at an ideal community, as did Lesueur and Neef