An interesting mind map showing lineages and connections of various systems theories: http://eyeonsociety.co.uk/resources/systemsGenealogy.pdf
Interesting that this website also includes this book which may prove useful in my trajectory: Raven, J (1995). The New Wealth of Nations: A New Enquiry into the Nature and Origins of the Wealth of Nations and the Societal Learning Arrangements Required for a Sustainable Society.
Also with some links to chapter pdfs available here: http://eyeonsociety.co.uk/resources/fulllist.html#new_wealth