Comparative Law

Most people arriving at a page like this one do not want a reading list. They have two jurisdictions and a narrow question, and they want to know whether the answer they already have in one place travels to the other. That is a different job from finding a document, and the tools below are grouped for it rather than for browsing.

Begin with the classification, and then stop leaning on it. Knowing that a system is usually described as codified, or as resting on judicial decision, tells you what kind of source a court there is likely to rely on, and roughly where to look first. It does not predict how a legislature consolidates its statutes, whether the state has retired print, how quickly amendments reach the published text, or which of two competing editions a court will accept. Every one of those is decided locally, by an administrative arrangement that has nothing to do with the tradition, and every one of them will wreck a comparison built on the tradition alone. The classification is a map of the terrain. The publishing arrangement is the road, and only one of the two gets you anywhere.

The second thing worth knowing early is that harmonised instruments have already done part of the comparison. Where two states have both adopted the same convention or built a statute from the same model law, the interesting question stops being how the two systems differ in principle and becomes how each one implemented a text they were both handed. That is a far more tractable question, and the adoption tables published by the drafting bodies answer the first half of it for nothing.

Now the awkward part. One of the six entries below sells access to what it holds. That is Brill's subscription reference work, which happens to share a name with this domain and is otherwise unconnected to it, and its page carries both doors. There is the institutional login everyone expects, and there is a short term purchase an individual can make, offered for one, seven or thirty days. That is a real option for a reader with one hard question and no library card, and it is worth knowing it exists rather than assuming the only door is an institutional one. What it costs today is on the publisher's own page and is deliberately not repeated here. A price copied into a guide goes out of date without anyone noticing, and this one describes another publisher's commercial terms, which are theirs to change and not this guide's to record. It is also worth knowing what the other five cover before paying for anything: between them they reach the national legislation of the Union's member states, one whole subject area across 200 jurisdictions, and the harmonised instruments two systems may already have in common.

What an open gateway does not give you is a guarantee that somebody checked the entry. The subscription work below names its editor and says a team of experts covers and updates its jurisdictions, which is a claim about who read the row. A gateway that describes itself as an entry point to somebody else's database is making no such claim, because it is not holding the row at all. So the discipline that matters in comparative work is to carry each half of the comparison back to the state that published it, separately, and to write down what each publisher claims about its own text. That is slower than reading one summary of both. It is also the difference between a comparison and an anecdote, and it is what the country pages in foreign legal research exist to make possible.

TOOLS, COLLECTIONS AND ONE PAYWALL

• JuriGlobe legal systems index, University of Ottawa (opens an external site) Classifies national legal systems against a roster its own headings put at 192 United Nations member states, and maps the result against language, population, trade and GDP. Six interface languages. Loads for an automated client with nothing asked of the reader.
• N-Lex (opens an external site) Calls itself a single entry point to the individual national law databases of the European Union countries, which is the distinction worth noticing: it queries them rather than holding their texts. Offered in 24 language versions, with a search across two or more countries at once.
• WIPO Lex (opens an external site) Describes itself as open and free, with more than 50,000 documents from 200 jurisdictions, organised into three collections: intellectual property laws and regulations, treaties, and judgments. One subject across many systems, which is the shape a comparison wants.
• UNCITRAL, texts and status (opens an external site) Conventions, model laws and rules in commercial transactions, grouped by subject, with a status table covering all of them. Useful in reverse: adoption status is a quick map of where two systems have already been aligned by a shared instrument.
• UNIDROIT Principles of International Commercial Contracts (opens an external site) A restatement issued by an intergovernmental institute whose stated purpose is to formulate uniform law instruments between states, which is what puts it above a national contract law rather than inside one. Its page offers the 2016 text under two headings, official languages and other languages. The block cached here lists five under the first and twelve under the second, and every one of those seventeen carries a download link pointing at a PDF on the institute's own address. A serviceable neutral vocabulary when two systems name the same idea differently.
• Foreign Law Guide, Brill (opens an external site) Paywalled, and unconnected to this site beyond the shared name. A subscription reference work edited by Marci Hoffman, with Thomas H. Reynolds and Arturo A. Flores named as its co-founding editors, covering approximately 190 jurisdictions and updated every month. It sells access to an individual as well as through an institutional login, and its short term purchase control is labelled Choose 1, 7 or 30 days, so a single day is the shortest of three terms rather than the only one on offer. The publisher states the current terms on its own page, which is where they should be read rather than repeated here.

For the second half of that discipline, the jurisdictions this guide has already carried back to their own publishers are listed in the A to Z country index. Each of those pages sets out how that jurisdiction publishes its law and in what language its governing text is written, traced to the documents it was read from, which is the material either side of a comparison has to rest on.

SOURCES

1. Legal Systems of United Nations Member States, the JuriGlobe classification index. University of Ottawa. https://www.juriglobe.ca/eng/syst-onu/index.php. Accessed 2026-08-31.
2. N-Lex, the common gateway to national law, English entry page. Publications Office of the European Union. https://n-lex.europa.eu/n-lex/index. Accessed 2026-08-31.
3. WIPO Lex, the database of IP laws, treaties and judgments, home page. World Intellectual Property Organization. https://www.wipo.int/en/web/wipolex. Accessed 2026-08-31.
4. Texts and Status, the UNCITRAL index of its own instruments. United Nations Commission on International Trade Law. https://uncitral.un.org/en/texts. Accessed 2026-08-31.
5. UNIDROIT Principles of International Commercial Contracts 2016, download page. International Institute for the Unification of Private Law. https://www.unidroit.org/instruments/commercial-contracts/unidroit-principles-2016/. Accessed 2026-08-31.
6. Foreign Law Guide, the publisher's description and access page for the database. Brill. https://referenceworks.brill.com/display/db/flg. Accessed 2026-08-31.

Reviewed 2026-08-31. 6 sources cited on this page.