The Babylonian Empire thrived after the fall of the Sumerians starting with the Old Babylonian period 1894–1595 BC. It is difficult to say the exact origins as there is little economic and legal evidence to pinpoint the chronological order of the people. However, there are lists of the kings with the most major ruler being Hammurabi. He managed to have all of Mesopotamia under his reign and he provided the first code of laws. This included 282 rules to help conduct commercial interactions and restore all types of justice among the people.
For more about stamp seals, see our relevant blog post: Making their Mark