(The Conversation) — How conspiracies spread has changed immensely over the history of the United States, as technology and media have evolved. But the nature of conspiracies has not. I teach communications courses at Villanova University, 12 miles from Philadelphia, on how conspiracy theories are created and disseminated. As the nation approaches its 250th anniversary on July 4, 2026, I have been thinking about the early history of Philadelphia and the controversial people, stories and ideas, including conspiracies, that permeated the city during the second half of the 1700s. Conspiracy theories describe alternative versions of events – such as the collapse of the twin towers of the World Trade Center on Sept. 11, 2001 – that contrast with the official, accepted versions of events. Conspiracies, however, involve small groups of people who act in secret for their own gain and against the common good. Examples of conspiracies include the Watergate scandal by President Richard Nixon and members of his administration, or the Tuskegee experiments in which U.S. public health professionals treated unsuspecting African Americans with …