"The Common Law," a great legal classic, was written by noted Supreme Court Justice Oliver Wendell Holmes, Jr. in 1881. The book is about common law in the United states, including torts, property, contracts, and crime. The substance of "The Common Law" is a series of lectures on the various common law subjects: criminal law, property law, contracts, consideration, torts, negligence, bailments, trespass, etc. What makes this book so important is not that the lectures were a summary of the current state of the law at the time Holmes spoke in 1881, but rather because Holmes insightfully explains how they got to be that way. Two tenets of early 20th century jurisprudence that Holmes propounded (and was influential in writing into law when he was later appointed to the Supreme Court of Massachussetts, and later of the United States) can be identified in this work: legal positivism and legal realism. Though a little tedious for non-lawyers, "The Common Law" illustrates some interesting points as Oliver Wendell Holmes, Jr. addresses the fluid basis for our legal system.