 There seems to be only general agreement on the idea that in some way or other manipulation interferes, or perverts, or takes advantage of factors that people would not want to influence, the decision making of agents. Whether manipulation must be intentional, whether it must be hidden, whether the motive of the manipulator matters, whether there has to be a gap between the way in which the influence causes behavior and the reasons which justify it , whether there has to be a manipulator if one is manipulated, all are contested in the literature (see papers in Coons and Weber 2013).