I recently read an article at Quality Digest called Profound Knowledge in Complex Systems: A Business Case. The article describes the work of Andrew McKeon who recently keynoted at the W. Edwards Deming Institute and Purdue University's 2013 Annual Fall Conference. McKeon spoke on the importance of sustainability and "doing the right thing" in business. He defines sustainability in two words: Systems Thinking. McKeon says “The ultimate system is our planet, and the ultimate aim is survival and continuation of life over the long-term,” He goes further to say Deming’s ideas on understanding systems are necessary to solve today’s problems.
If you have an interest in systems thinking and sustainability, I recommend this article. You can read the article here: Profound Knowledge in Complex Systems: A Business Case