Second: the growth of global income; the disappearance of infectious diseases; the feeding of seven billion; the clean-up of rivers and air; the reforestation of much of the rich world; the internet; the use of mobile-phone credits as banking; the use of genetic fingerprinting to convict criminals and acquit the innocent. Every single one of these was a serendipitous, unexpected phenomenon supplied by millions of people who did not intend to cause these big changes.
