People think there's a single solution to complex problems, and the solution is often making an enemy of a group of people - pulling back and rejecting the other.

In the end, that's a blind alley - we have to get back to being able to think on our feet and react.

There's no point in just hankering for the big trade unions of the 1950s or '60s.

The magic formula is there is no magic formula.

Until you have looked in depth at the system and found out where women in Egypt are not being cut through female genital mutilation, or where kids in Vietnam are not malnourished, or where hospitals in America are getting rid of the superbugs anyway - unless you have that level of curiosity about what's going on without you, you will always come in with your great new recipe and just ignore what's going on, and that will make you much less effective at what you're trying to achieve.

Economists who studied in the '80s tend to have a pretty crude neoclassical view that's just about freeing up prices and markets, and then you'll get the growth and everybody benefits. And they'll just repeat that, because if you're a minister or a senior civil servant, you don't have time to read anything anymore. You get very fixed in your views.

We should look at how "the enemy" - people that you wouldn't necessarily agree with - have done change and see whether there's bits in there that we could learn from.