One of the lessons of history is that even the deepest crises can be moments of opportunity. They bring ideas from the margins into the mainstream.

With a fractured sense of self, we come to depend on what people feed back to us - often mediated through social networks - not what we are. We have complex identities but may become less able to act as a subject - confident in what we really are.

Societies advance through innovation every bit as much as economies do.

Social innovation thrives on collaboration; on doing things with others, rather than just to them or for them: hence the great interest in new ways of using the web to 'crowdsource' ideas, or the many experiments involving users in designing services.

I'm not saying [economic] growth is wrong, but throughout the years of growth, many things didn't get better. ... If you look at America, the proportion of Americans with no one to talk to about important things went up from a tenth to a quarter.

Health is already a dominant sector in most societies and the one most guaranteed to grow.

The City of London has never been known for understanding technology and has never matched Silicon Valley's tradition of knowledgeable investment in technology start-ups, just as the U.K. government has never matched the vast investment made by the U.S. government.