During the first ten years they were instructed in the duties of their profession, they practised them during the second ten, and in the last ten years, they instructed the novices. […] When they discover the use of vegetable substances, and acquire the art of procuring them from the fields, they have advanced one step in civilization — they are in the agricultural state. […] Then they were poor and in want, because they did very little work, and ravaged each other’s territory. […] Men must think much before they can do any thing. […] This condition of the elements they called Chaos.