Two concepts of management style are drawn together in this paper for a more complete description of the individual and therefore of the organisation. The concepts are those of decision style, based on Jung's personality types, and Maslow's concept of basic motivation, embracing his famous hierarchy of needs. Maslow's growth-motivated are found to have the flexibility of decision style which characterises the best managers. This unified concept of the individual enables a better understanding of many issues in planning and management and examples are given in organisational design and personnel planning. A growth-motivated management is seen as necessary for successful multidimensional functioning and decision style must be matched to organisational purpose. The lifecycle of organisations is characterised by growth-motivated founders and their decline attributable to the loss of this growth-motivation and to decision styles inappropriate to the stage of lifecycle and purpose of the organisation.