No longer do project managers have to exercise negative power indiscriminately and in a way that is counterproductive towards their projects and themselves . Margaret Wheatley says that the quality of the relationship is what makes the difference. If the "stick" is used, negative energy is evoked; if the " carrot " is used, then positive energy. 
Project leadership, of course, is not something that simply pops up on projects. It requires a paradigm shift. This paradigm shift is in line with what the contemporary scholars and practitioners have come to believe constitutes the patterns of leadership.
 Margaret J. Wheatley, Leadership and the New Science , Berrett-Koehler, San Francisco, 1994, p. 39.