Employees today have different expectations of their supervisors. Leadership has evolved into a perspective that allows a leader to step beyond their own worldview and values to understand and appreciate those of the company and its employees. To meet this challenge, Rainer Krumm developed the leadership principle of the 9 Levels of Value Systems, based on the work of American psychology professor Clare W. Graves. In this guide, he presents this sustainability-oriented approach, which is based on values and value systems. He demonstrates how leaders can embody various aspects of leadership, significantly shaping the company culture and influencing how the company is perceived from the outside.