Roy Rosenzweig is professor of history and Director of the Center for History and New Media at George Mason University. He is the author of several books including
The Park and the People: A History of Central Park (with Elizabeth Blackmar). He is also the coauthor of
Who Built America?, a two-volume multimedia CD-ROM.
David Thelen is professor of history at Indiana University and editor of the
Journal of American History. He is also the editor of
Discovering America: Essays on the Search for an Identity, and the author of several books including
Becoming Citizens in the Age of Television.