In this paper, we assess the evolution of 32 state constitutions and the U.S. Constitution over a 100+ year time period (1776-1907). We construct an original sectionlevel dataset containing the text of every section within a constitution for every year between the adoption of the state’s first constitution and 1907. We classify each section by topic and compare the content of each new constitution as well as the impact of amendments. With a subset of these data, we analyze the extent to which sections were added, deleted, modified and remained the same over time using a novel approach that relies on an edit distance measure to quantify the similarity between sections of two constitutional documents. We are also able to empirically evaluate the level of similarity of modified sections as new constitutions were adopted or alterations were made to an existing constitution. Finally, we determine which topic areas were subjected to the largest amount of change. We demonstrate that it is possible to systematically assess a large corpus of constitutional documents to test theories of institutional change, provide empirical support to existing qualitative accounts, and create operationalizations of concepts such as “stickiness” that are comparable across states and over time.