I want to know the answer to the following question:
In what year did Ferguson publish An Essay on the History of Civil Society?
All the background I'm provided with is that "In his 1767 An Essay on the History of Civil Society, Ferguson uses the four stages of progress, a theory that was very popular in Scotland at the time, to explain how humans advance from a hunting and gathering society to a commercial and civil society without "signing" a social contract.". Is that enough to answer the question?
Answer: yes