Oliver Wendell Holmes Jr. was a renowned jurist and philosopher of the 19th century who made significant contributions to modern legal theories. He is well-known for his insights on the American legal system, particularly his views on judicial activism and constitutional law. Due to his influence in the legal world, he is often referred to by various synonyms, such as Holmes Jr., O.W. Holmes, Justice Holmes, and The Great Dissenter. These names are used interchangeably to describe his important role in American jurisprudence and his lasting impact on legal thinking. Today, his legacy continues to shape legal education and practice worldwide.