The term "late capitalism" was first used by Werner Sombart in his magnum opus "Der Moderne Kapitalismus", which was published from 1902 through 1927, and subsequent writings; Sombart divided capitalism into different stages: (1) proto-capitalist society from the early middle ages up to 1500 AD, (2) early capitalism in 1500–1800, (3) the heyday of capitalism ("Hochkapitalismus") from 1800 to the first World War, and (4) late capitalism since then. Sombart's work was never translated into English, but historians sometimes do refer to "late bourgeois society" in contrast to "early bourgeois society" in the 17th and 18th century, or "classical bourgeois society" in the 19th and early 20th century.