Making Sense of Behavior, The Meaning of Control by William T. Powers is a profound and sometimes funny introduction to control theory as applied to the behavior of living things. Written for the common reader, MSOB demonstrates how "living control systems" really behave and interact. Deliberately simple examples peel back the layers of Powers' Perceptual Control Theory (PCT) to reveal its universal truths. PCT is taught in the Life Science disciplines in a growing number of universities worldwide. Practical PCT applications continue to multiply: the study of infants (Netherlands); the turnaround of troubled schools (USA, Australia), Leadership Training (USA, Canada).