[2] For most of his life, Harrison has been a journalist and writer on the environment, Third-World development and poverty.
Harrison has worked for six UN agencies and travelled to many Third-World countries in Asia, Africa and Latin America.
He was the lead author of the American Association for the Advancement of Science Atlas of Population and Environment.
[11] Harrison was born in Oldham, Lancashire, England, and has master's degrees in European languages and literature (University of Cambridge 1963-66) and political sociology (London School of Economics 1967-8), and in 1995 a PhD from Cambridge in Earth Sciences and Geography.
[7] In July 1996 he posted the first page of what became the scientific pantheism site, and in 1997 he started the mailing list that grew into the World Pantheist Movement.