Spiral Dynamics is a dynamic model of human development and development of memes carrying systems - the 1996 book Spiral Dynamics by Don Beck and Chris Cowan based on the theories of psychologist Clare W.
Spiral Dynamics: "SD is the most powerful model I encountered in 10 years of graduate work in the social sciences. The article is well worth a click/a few minutes of your time. And this is not just ivory tower theorizing. You are likely to be able to use at least something of what you learn in your daily life."