Guide to Interest Groups and Lobbying in the United States offers a thematic analysis of interest groups and lobbying in American politics and over the course of American political history. It explores how interest groups have organized and articulated their support for numerous issues, and have they grown – both in numbers and range of activities – to become an integral part of the U.S. political system. Beginning with the foundations of interest groups during the late 19th Century Gilded Age, to the contemporary explosive growth of lobbying, Political Action Committees, and new forms of interest group cyberpolitics, readers are provided with multiple approaches to understanding the complex and changing interest advocacy sphere .