On Purposeful Systems: An Interdisciplinary Analysis of Individual and Social Behavior as a System of Purposeful Events
"What makes this book 'magical' is that Ackoff provides 'operational definitions' for many ill-defined words and concepts - from defining 'knowledge' and 'understanding' to providing definitions of feelings/emotions.... In terms of Kuhn's idea of 'paradigm shifts' - this book represents a shift that has yet to be appreciated, thirty years later." - W. Curtiss Priest, Massachusetts Institute of Technology"