Subject(s): Community planning -- City planning -- Civilization, Modern in 1950 -- Civilization, Modern from 1950- -- Addresses, essays, lectures -- Western civilization 1970-1979 -- Resource needs and demand, Food - the great challenge of this crucial century, population control of Hobson's choice -- Tragedy of the common, Economics of permanence, Technological flaw, Historical roots of our ecologic crisis, Sacramental vision of nature -- Technocracy challenged : Science, Technology -- Technology for an alternative society, Ecology and revolutionary thought -- Self-sufficiency, China: a new society in the making -- Human future : in India, Community and city planning