So the search was on for more workable categories. In his 1877 Ancient Society, Lewis Henry Morgan proposed a series of steps from ‘savagery’ through ‘barbarism’ to ‘civilization’ which was widely adopted in the new field of anthropology. Meanwhile, Marxists concentrated on forms of domination, and the move out of primitive communism towards slavery, feudalism and capitalism, to be followed by socialism (then communism). All these approaches were basically unworkable, and eventually had to be thrown away as well.