How does the concept of a cooperation economy promote sustainable development and address income inequality?

What level of responsibility does the developed world have to promoting development for the underdeveloped world, for these less-developed countries?

How does the mixed economic system benefit the global economy? Explain your answer.

To answer this question please refer to chapter 13, "Development Economics: The Wealth and Poverty of Nations," in Charles Wheelan's Naked Economics:Undressing the Dismal Science. According to Wheelan all of the below are important determinants for economic growth and development of nations, EXCEPT THIS ONE. Which of the below does Wheelan consider to be NOT ESSENTIAL for economic growth and development? A) Well-defined property rights.   B) Openness to trade.   C) Non-excessive levels of regulation.   D) Possession of large amounts of natural resources.   E) Human capital.   F) Responsible fiscal and monetary policy.