“I reduce to two the systems of philosophy which deal with man's soul. The first and older system is materialism; the second is spiritualism.”
p, 125
Man a Machine (1747)
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Julien Offray de La Mettrie 42
French physician and philosopher 1709–1751Related quotes

Source: Introduction to Systems Philosophy (1972), p. xix.
Ashby (1958) "General Systems Theory as a new Discipline". General Systems, 3 (1958). p. 1-6; cited in: Ludwig von Bertalanffy (1968) General System Theory. p. 94-95
Jay Lemke. " Ecosocial Dynamics http://academic.brooklyn.cuny.edu/education/jlemke/ecosoc.htm," at academic.brooklyn.cuny.edu, Accessed 03. 2017.

Page 55.
The Mythical Man-Month: Essays on Software Engineering (1975, 1995)
"Malala Yousafzai and Kailash Satyarthi Are Awarded Nobel Peace Prize" by Alan Cowell and Declan Walsh, in The New York Times (10 October 2014)

trans. Michael Chase, p. 157
La Philosophie comme manière de vivre (2001)

The Greening of America turns 40 (2010)
Context: What is lacking today is that people are not in any way experimenting with a different way to live, a different way to feel, a different way to be.
The things that troubled young people in the '60s and the things that trouble young people today seem quite different, in the sense that the troubles today are mostly material trouble — I can't get a job; I can't support a family; whereas the complaints in the 1960s were more spiritual — I don't feel like a real person, or something like that. However, they are related.
Whether you're complaining about spiritual emptiness or material emptiness, you're ultimately complaining about the same system that's creating both kinds of emptiness. That's the link between The Greening of America of 40 years ago and the way young people are feeling today.