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Commentaries on the Laws of England

18th-century treatise by Sir William Blackstone

  • 14 min read
  • 6 chapters

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The Commentaries were long regarded as the leading work on the development of English law and played a role in the development of the American legal system. They were in fact the first methodical treatise on the common law suitable for a lay readership since at least the Middle Ages. The common law of England has relied on precedent more than statute and codifications and has been far less amenable than the civil law, developed from the Roman law, to the needs of a treatise. The Commentaries were influential largely because they were in fact readable, and because they met a need. As such, they were used in the training of American and British lawyers long after the death of Blackstone.

The Commentaries are often quoted as the definitive pre-Revolutionary source of common law by United States courts. Opinions of the Supreme Court of the United States quote from Blackstone's work whenever they wish to engage in historical discussion that goes back that far, or farther (for example, when discussing the intent of the Framers of the Constitution). The book was famously used as the key in Benedict Arnold's Arnold Cipher, which he used to communicate secretly with his conspirator John André during their plot to betray the Continental Army during the American Revolution.

Publication history

In 1765 Blackstone announced his resignation from the Vinerian Chair, effective after his 1766 lectures. These were divided into two 14-lecture series, on "private wrongs" and "public wrongs" delivered between 12 February and 24 April. At this point Blackstone had published nothing new since A Treatise on the Law of Descents in Fee Simple in 1759. The decision to resign was most likely due to the increasing demands of his legal practice and the reduced profit from the lectures, which, after peaking at £340 in 1762, dropped to £239 a year later and to £203 for the final round of lectures in 1765–66.

In response, Blackstone decided to publish a new book Commentaries on the Laws of England. The first volume was published in November 1765, bringing the author £1,600; the full work would eventually bring in over £14,000. Owen Ruffhead described Volume I as "masterly", noting that "Mr Blackstone is perhaps the first who has treated the body of the law in a liberal, elegant and constitutional manner. A vein of good sense and moderation runs through every page". Every copy was sold within six months, and the second and third volumes, published in October 1766 and June 1768, received a similar reception. The fourth and final volume appeared in 1769, dealing with criminal law. With the financial success of the Commentaries, Blackstone moved in 1768 from his London property in Carey Fields to No. 55 Lincoln's Inn Fields. Neighbours included the Sardinian ambassador, Sir Walter Rawlinson, Lord Northington, John Morton and the Third Earl of Abingdon, making it an appropriate house for a "great and able Lawyer".

Blackstone's treatise was republished in 1770, 1773, 1774, 1775, 1778 and in a posthumous edition in 1783. Reprints of the first edition, intended for practical use rather than antiquary interest, were published until the 1870s in England and Wales, and a working version by Henry John Stephen, first published in 1841, was reprinted until after the Second World War. The first American edition was produced in 1772; prior to this, over 1,000 copies had already been sold in the Thirteen Colonies.

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