Back to the Future: AI and the Legal Profession
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Back to the Future: AI and the Legal Profession<br>The future of the law looks a lot like the past
Evan Zimmerman<br>May 27, 2026
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Every conversation about AI and the legal profession eventually arrives at the same anxious question: what happens to the lawyer? It’s a fair worry. The associate model that defines elite law firms today depends on armies of well-paid juniors doing rate-limiting work—document review, first-pass drafting, research memos—that LLMs already do faster, cheaper, and (whisper it) often better. If you take that work away, the whole pyramid wobbles.<br>But the panic about the lawyer’s future would be more credible if today’s lawyer were the natural, eternal form of the profession. The pyramid-shaped firm with a ten-year partnership track and hyper-specialized practice groups is, in the long arc of legal history, a recent invention, barely a century old and contingent on the technology of its era. Even the billable hour is relatively new.<br>Add in AI and what you get isn’t the death of the lawyer. Instead, a lawyer’s work looks like a blast from the past. But it will make the law firm’s structure look different than what we’ve seen before. It will look more like a normal company.<br>The lawyer (and law firm) of 1872
In 1872, there were exactly three law firms in the entire United States with five or more lawyers. Three. The “large firm” of the era, by the era’s own definition, had four people in it. As late as 1906, a respectable Chicago firm like Holt, Cutting & Sidley consisted of four lawyers, four clerks, and ten non-lawyer staff — a ratio that today would risk looking quaint.<br>These small firms didn’t specialize. A nineteenth-century lawyer was a generalist by default, doing whatever his clients needed: a will on Monday, a railroad easement on Tuesday, a contract dispute on Wednesday, a criminal defense on Thursday. The infrastructure for specialization didn’t exist yet. No formal practice groups, no specialty bars, often no formal legal education required for admission. You learned law by doing law, and you did all of it.<br>The work itself looked different too. The bottleneck was document production, which was physically hard. A “scrivener” (usually a young man without formal legal training) would handwrite fair copies of every document, every contract, every pleading.1 A good scrivener could produce maybe 30 words per minute.2 The lawyer’s job was to know the law, draft the original, and direct the production. The scrivener’s job was to turn that intent into a document.
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Similarly, a law librarian did much of the manual work of maintaining information. A law librarian would do more than merely maintain a library of physical books like case reporters, statutes, and treatises. They would also file daily updates into binders, called “loose-leafing,” to make sure the legal materials were all up-to-date. They would not only maintain catalogs and develop indices but also go down into the shelves to do the first cut of legal research on behalf of the attorney.<br>This setup is more than historical color. It’s the original division of labor in legal work, and it’s worth holding in your head while we look at what came next.<br>The (original) Cravath system
The pyramid-shaped firm we now treat as the natural state of law is the product of a specific person solving a specific problem. Around 1906, Paul Cravath was reorganizing his firm to handle the legal work coming out of the second industrial revolution. Think Westinghouse reorganizations, railroad consolidations, early electrical-industry litigation. The small generalist partnership was visibly inadequate to the scale. So he built something new.
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The “Cravath System,” as it came to be called, had a few innovations that compounded into something larger than their parts. He hired straight from the top law schools. He paid associates a salary instead of letting them eat what they killed. He brought in professional law librarians (a first). And he trained his associates as generalists.<br>The Cravath rotation system, which the firm still describes on its website today, moved associates through different practice groups every fifteen to eighteen months. As the firm itself puts it, the system was “designed to produce lawyers with breadth, sophistication and a deep working knowledge of a wide variety of practice areas.” The point was emphatically not to crank out specialists. An associate would do litigation for a stretch, then corporate, then tax, then back to litigation under a different partner, building a generalist’s intuition for the firm’s full range of work before any specialization happened.<br>Note the unit of measurement. Every fifteen to eighteen months, a new rotation. Total tenure as an associate was a multi-year apprenticeship. Robert Swaine, Cravath’s chronicler, was explicit: “Men who are willing to stay only a year or two are not desired, for the Cravath...