This is a controversial contribution to Marxist theory, initially used to explain pre-slave and pre-feudal large earthwork constructions in China, India, the Euphrates and Nile river valleys (and named on this basis of the primary evidence coming from greater "Asia"). The Asiatic mode of production is said to be the initial form of class society, where a small group extracts social surplus through violence aimed at settled or unsettled band communities within a domain. Exploited labour is extracted as forced corvee labour during a slack period of the year (allowing for monumental construction such as the pyramids, ziggurats, ancient Indian communal baths or the Chinese Great Wall).