A glance at two world maps, one produced before and the other after World War II, reveals great changes in the geo-political order. While the number of independent countries before the war numbered sixty, the post-war period, with the break up of empires and the formation of new states, has raised the number to the point where we now can count 196. Most of these countries have a written constitution as well, and many have a series of previous constitutions, since revised or discarded. The result is a huge body of texts, each ostensibly containing the fundamental (if in not all cases the actual) law of a nation or state. This edition of Researching Law examines ABF Research Professor Tom Ginsburg’s work analyzing world constitutions and their texts.