Discovery Education Video; Mesopotamia and CuneiformAround 3500 BC an advanced civilization known as Mesopotamia existed along the Tigres and Euphrates Rivers--today it is Iraq. The valleys were fertile; the city/state had massive fortifications, and they had developed a writing system, known as Cuneiform. This civiliation had law codes and literature with themes that are still used today. (1:18 min) remember to login with cms in front of your student id number and your birthdate.