He was Commissioner of the United Nations in Rwanda and Burundi in 1959, for elections and the referendum that led these countries to independence.
After his retirement in 1985 he taught at the University of California at Berkeley for six years, then, from 1993, to Claremont Pitzer Colleges.
The reflection of twenty years led to the publication of his book When Misery Hunts Poverty (2003).
In this book, the author summarized his approach: The spread of widespread misery and poverty is an obviously unacceptable social scandal, especially in societies perfectly capable of avoiding it.
It is this research that brings me now to show how a radical transformation of our lifestyle, including a reinvention of the chosen poverty, has now become the sine qua non of any serious struggle against new forms of production misery.'