> >So, the forms of cooperation are two - voluntary and involuntary. So Harry Pollard suggests, going on to note that earlier economists talked of wealth, which has now become incredibly complex to define. But everyone who is not in economics (and perhaps some who are) recognize that "voluntary" is not such a simple term. Marx, JSMill (in the power of public opinion in On Liberty), Freud and other psychologists, Foucault -- the list of those who raise questions about the meaning or content of "voluntary" is legion. Similarly, indeed, there are many who wonder about involuntary. Even those who are coerced act in many cases with some degree of voluntariness. After all, Jack Benny knew that he had a choice when an armed robber threatened him with, "Your money or your life!" Peter G. Stillman