The history of law is an expansive and complex topic that spans centuries of civilizations and covers a multitude of jurisdictions and perspectives. The modern concept of law has its origins in the ancient legal systems of several civilizations, most notably the Babylonian, Roman, and English systems. The modern legal system has evolved over time as a way to mediate disputes and guarantee freedom and liberty to those under its jurisdiction. In the United States, law is derived from the U.S. Constitution, statutes enacted by Congress, court decisions, and treaties. Throughout history, law has been used to protect individual rights, limit the power of governments, and promote economic freedom.