I WHAT IS NOT IN THIS BOOK
To begin with what is not in this book may seem odd; but it will otherwise remain unknown until the end, which seems unsatisfactory. This is not a comprehensive account of Roman law, or even of Roman law in its social setting.
It is highly selective. There is nothing here about criminal law, and next to nothing about public or constitutional law. The focus is on the so-called classical period of Roman law, from about the end of the Roman republic in 31 bc until the death of the emperor Severus Alexander in ad 235. There is nothing here about post-classical law; and there is almost nothing about pre-classical law.The warning about non-comprehensiveness is seriously intended. Law does not consist in generalities, and it is often said that the devil is in the detail. Undoubtedly that is right. But for present purposes it has been necessary to focus only on details which seem germane to the exploration at hand, of law and society. Many other details are glossed over, so anyone wanting a full account of the rules must look at one of the textbooks on the law. They are cited in the bibliographical essay at the end.
This chapter gives a rapid outline of the sources of Roman law, essentially for the purpose of making the ensuing discussion of substantive law comprehensible (fuller discussion may be found in Jolowicz and Nicholas 1972: 86—ioi, 353—94). The expression ‘sources of Roman law' can mean two things: in the first sense it refers to where the law came from, statute, custom, decisions of courts and so forth; in the second it refers to how we know what we know about Roman law, our literary or documentary evidence of the past. The first of these senses is dealt with in this chapter; the second in the next. This chapter also deals briefly with the question how far the law at Rome was also the law in the provinces of the Roman empire.