The Continuum Concept: In Search of Happiness Lost, by Jean Liedloff. 

Jean spent two and a half years living with natives deep in the South American jungle.  The experience demolished her Western preconceptions of how we should live and parent and led her to a radically different view of what human nature really is. She offers a new understanding of how we have lost much of our natural well-being and shows us practical ways to regain it for our children and for ourselves.  Lots of attention paid to the benefits of babywearing.

"Deserves to be read by Western parents, child psychologists, and other social engineers concerned with restoring self-reliance and well-being. There are remarkable insights here." The New York Times Book Review

192 pages, paperback