Economic secession has been variously defined by sources. In its narrowest sense, it is abstention from the state’s economic system – for instance by replacing the use of government money with barter, Local Exchange Trading Systems, or commodity money (such as gold). Wendell Berry may have coined the term "economic secession." He promoted his own version in his 1991 essay Conservation and Local Economy. John T. Kennedy used the term to refer to all human action that is forbidden by the State.