Arthur Corbin was a very important lawyer who lived a long time ago. He liked to study and write about the rules and laws for how people behave with each other and the government. This is called "legal theory".
One of his most famous ideas was that the law should be fair and just for everyone. That means that nobody should be treated differently just because of things like their race or religion. He also believed that it was important for judges and lawyers to understand the history and culture of the people they were working with, so that they could make good decisions about the law.
Corbin wrote many books and articles about legal theory, and his ideas still influence how we think about the law today. Even though he is no longer alive, his work continues to help lawyers and judges all over the world.