 In the Clarke Collins correspondence of 1707–08 Collins claims that Clarke’s argument for dualism is useless to religion and morality because of the problem of explaining how the immaterial mind and the material body interact. One of Clarke’s counter-charges is that Collins’ materialism is not just useless but dangerous to religion and morality because it implies a determinism that is destructive of religion and morality (Clarke 1738 [1928: 831], Clarke and Collins: 192).