The essential provides an introduction to the agility concept, especially as an organizational, management and communication concept, and redefines the contribution of internal communication within this concept. With regard to agile organizations, the authors focus on the interplay of hierarchical and heterarchical structures, with special attention being paid to network organization. This opens up new perspectives on the functions of controlled communication as part of management action. The management function "internal corporate communication", including leadership communication, thus undergoes a substantial development in this context of current management theory.