What was an important principle of Roman law?

Roman law was very important in the Roman Empire. At first, Rome had something called the Twelve Tables. This was the original Roman law around 450 BC. It met the basic needs of the farming society that characterized Rome at that time. As the Roman Empire grew, the Twelve Tables were replaced by Civil Law. However, the Civil Law applied only to Roman citizens. Eventually, issues arose between citizens and non-citizens. The Civil Law was replaced by the Law of Nations. This law applied to everybody living under Roman rule. Some of the principles of the Law of Nations are used today. One of these principles is that everybody is innocent until proven guilty. This principle is very important in our legal system as well as the legal system of other countries. Thus, elements of the Roman law are used today.