For as long as humans see themselves as the centre of life on earth, they'll not be able to keep that life going. Andrew Dobson explains the need for a cultural revolution to de-center human beings.
Crispin Tickell surveys the rampant rise of human population - from being a species to a geological period - and wonders if our size will eventually be our ultimate undoing.
In 1961, the year in which WWF was established, the world was a very different place. Then, around a billion people lived in the world, fewer than half the number now alive, global average life expectancy was around 30 per cent lower than today, and air travel was a luxury for the few while mobile phones and the internet were part of science fiction.