Original sentence: A group of conspirators.A joining or acting together, as if by sinister design: a conspiracy of wind and tide that devastated coastal areas.An agreement between two or more persons to commit a crime or accomplish a legal purpose through illegal action.An agreement to perform together an illegal, wrongful, or subversive act.From the American Heritage Dictionary of the English Language, see :.In a political context, a conspiracy theory is a theory that defies common historical knowledge or current understanding of events, under the claim that those events are the result of manipulations by two or more individuals conspirators in positions of power and with the ability to cover their tracks.con·spir·a·cy
Edited sentence: A conspiracy theory is a theory that defies common historical or current understanding of events, under the claim that those events are the result of manipulations by two or more individuals or various secretive powers or conspiracies