There is an assortment of collectives and individuals with a vested interest in terrorism and they have defined the term in the form that suits their bias or perspective. They include organisations and alliances of nations, academics and researchers, the legal profession, the health profession, counter-terrorist and law enforcement agencies, governments that wish to protect their citizens, governments that wish to repress their citizens, terrorist groups and the media. They have different agenda, even within their groups, and so it is unlikely that there will be agreement on a common definition of terrorism. This will have social and political consequences.