U.S. Treaties and Agreements Library

It began with thousands of index cards—thoroughly checked and edited—and two avid researchers: Adolf Sprudzs and Igor Kavass. In 1973, the United States Treaty (UST) Cumulative Index was published by William S. Hein & Co., Inc. The collaboration with William S. Hein & Co., Inc. was sparked after Kavass and Sprudzs spoke with the company’s founder William “Bill” Hein Sr., who expressed his support for their mission to compile a more comprehensive treaty index than what already existed.

A treaty is an agreement between two or more nations. Sometimes also called accords, charters, conventions, pacts, or protocols, treaties can either be bilateral (between two countries) or multilateral (between three or more countries). Watch the video below or keep reading this guide to learn a few different methods for efficient treaty research in HeinOnline.

In August 2019 a record number of wildfires ravaged the Amazon rainforest. In June, it was estimated that deforestation in the Amazon has risen by more than 88% compared to 2018. This increase in tree loss has sparked concerns about the fate of the Amazon and other forests across the globe. Learn about the environmental, societal, and economic importance of trees and discover current efforts to slow deforestation with HeinOnline.

The Treaty of Paris was signed in 1783 as a peace agreement between Great Britain and the United States of America to formally end the American Revolutionary War. Learn more about the evolution of the treaty with primary sources in HeinOnline.