by Isaac Asimov, Peter Nicholls, Bruce Page, Norman Myers, Magnus Pyke, Clarke, Robin., Dan Smith, Duncan Campbell, Frank Barnaby, Martin Walker, Mick Hamer, Ian Graham, Michael Elkins, Richard Hawkins, Christiaan Barnard, Humphrey Evans, James Samuel Coleman, Betty Friedan, Raymond Williams
Edited by Isaac Asimov Devised by Peter Nicholls Analysing the Future by Bruce Page Population and health by Norman Myers The world's food supply by Magnus Pyke Is Earth Over-Exploited? by Robin Cl…