This is a theory of behavior, from systems theory, based on the postulate that all our behavior is internally motivated to satisfy physical needs and/or psychological. This means that you have intrinsic control over your actions and are not influenced by external or extrinsic factors. Glasser (1999) explains that all we do in our lives is behave well and that we choose our behavior in an attempt to meet one or more of the five basic human needs built into our genetic structure, namely belonging, pleasure and freedom. , power and survival. Glasser suggests that we rely on our knowledge and skills, which enable us to meet our basic human needs as identified in Maslow's needs theory model (physiological, safety, social and self-fulfillment needs). ). He suggests that these needs provide the general motivation for everything we do. The individual may not be fully mentally aware of their basic needs, but these needs will indirectly motivate their choices. The strength of each need varies from person to person. For example, some are motivated more by the social need to love and belong, while others are motivated more by the need to be.