Incluye referencias bibliográficas e índice CONTENIDO: The changing nature of managerial and professional work. Introduction -- Diversity, interdependence, and power dynamics in organizations: beyond naïveté and cynicism -- The leadership challenge: making social complexity work for us, not against us -- The relational context of work. Relations outside the chain of command: overcoming resistance and gaining cooperation without formal authority -- Relations with subordinates: coping with dependence on a complex human system -- Relations with superiors: the challenge of "managing" a boss -- The life cycle of leadership. Early career: developing an adequate power base -- Mid-career: using power without abusing it -- Late career: letting go gracefully -- Implications. Improving personal effectiveness at work: some recommendations -- Leadership skills as social capital: an agenda for the future.