Much interesting information on this subject can be found at the Share International Web Site
A small number of examples are linked below
On that web site there is a recording of extracts from one of many very helpful talks given by the late Mr Benjamin Creme. This particular recording is of a talk he gave in New York City in 2010. It is recorded in sections. We have found this makes it easier to consider the information at one's own pace.
The same recording is also available on the Share International YouTube Channel
On YouTube there a very nice interview with the late Mr Creme from 2014 by Mantra FM Radio which is interpreted between Spanish and English by Author, Journalist and Broadcaster Patricia Pitchon.
A recording of extracts from an earlier talk by Benjamin Creme, New York in 2008, is also available at this link on the Share International YourTube channel; along with much other interesting and thought provoking material.