“If the whole process of learning from failure means discarding stuff that's not working, but in fact, our natural reaction is to keep going, to throw more money behind it, to throw more emotional energy behind it... that's a real problem.”

“Failure's inevitable. It happens all the time in a complex economy. And how did the economy produce all these amazing things that we have around us, computers and cell phones and so on? Well, the process was trial and error. There were a bunch of ideas, and the good ones grew and prospered, and the bad ones were pretty ruthlessly weeded out.”

“How did the economy produce all these amazing things that we have around us - computers and cell phones and so on? There were a bunch of ideas, and the good ones grew and prospered. And the bad ones were pretty ruthlessly weeded out.”

“If the whole process of learning from failure means discarding stuff that's not working, but in fact, our natural reaction is to keep going, to throw more money behind it, to throw more emotional energy behind it... that's a real problem.”

“Consider the situation: Money that was provided because of social networks rather than need; a project designed for prestige rather than to be used; a lack of monitoring and accountability; and an architect appointed for show by somebody with little interest in the quality of the work. The outcome is hardly surprising: a project that should never have been built was built, and built badly.”

“We still don't have a good word to describe what is missing in Cameroon, indeed in poor countries across the world. But we are starting to understand what it is. Some people call it 'social capital, or maybe 'trust'. Others call it 'the rule of law', or 'institutions'. But these are just labels. The problem is that Cameroon, like other poor countries, is a topsy-turvy world in which it's in most people's interest to take action that directly or indirectly damages everyone else.”

“Accepting trial and error means accepting error. It means taking problems in our stride when a decision doesn't work out, whether through luck or misjudgment. And that is not something human brains seem to be able to do without a struggle.”