Mesopotamia is a region, not a country. Refer to the individual Peoples that made up Mesopotamia; the Sumerians, Akkadians, Babylonians,  Assyrians, Chaldeans, and to some degree the Hittites, Phoenicians and In the narrow sense, Mesopotamia is the area between the Euphrates and Tigris rivers, north or northwest of the bottleneck at Baghdad, in modern Iraq; it is Al-Jazirah ("The Island") of the Arabs. South of this lies Babylonia, named after the city of Babylon. However, in the broader sense, the name Mesopotamia has come to be used for the area bounded on the northeast by the Zagros Mountains and on the southwest by the edge of the Arabian Plateau and stretching from the Persian Gulf in the southeast to the spurs of the Anti-Taurus Mountains in the northwest. Only from the latitude of Baghdad do the Euphrates and Tigris truly become twin rivers, the rafidan of the Arabs, which have constantly changed their courses over the millennia.