This book explores the US Supreme Court's impact on the constitutional development of the federal government from the founding era forward. The author's research is based on an original database of several hundred landmark decisions compiled from constitutional law casebooks and treatises published between 1822 and 2010. By rigorously and systematically interpreting these decisions, he determines the extent to which the court advanced and consolidated national governing authority. The result is a portrait of how the high court, regardless of constitutional issue and ideology, persistently expanded the reach and scope of the federal government.