Advocacy has been a feature of journalism since the early days of the profession, with columnists and editors attempting to sway popular opinion and influence public policy through their writings. Though it is quite different in format, muckraking, or investigative journalism, is an outgrowth of the advocacy movement. Muckrakers first came into prominence in the early part of the twentieth century, investigating corruption and influencing opinion and policy through the power of their exposes.H.L. Mencken, Jack Anderson, Rachel Carson, William F. Buckley, Karl Marx, Gloria Steinem, Tad Szulc and David Wise are just a few of the over 100 writers and editors profiled in this work. The writers' major works are the focus, but their overall careers and those who influenced them are also fully detailed. The biographies include vital dates and information on the journalist's family, education and other pertinent details.