By around the 19th century BC, much of southern Mesopotamia was occupied by Amorites, nomadic tribes from the northern Levant who were Northwest Semitic speakers, unlike the native Akkadians of southern Mesopotamia and Assyria, who spoke East Semitic. The Amorites at first did not practice agriculture like more advanced Mesopotamians, preferring a semi-nomadic lifestyle, herding sheep. Over time, Amorite grain merchants rose to prominence and established their own independent dynasties in several south Mesopotamian city-states, most notably Isin, Larsa, Eshnunna, Lagash, and later, founding Babylon as a state.