Trade has played a vital role in the social evolution of humankind. It allowed people to specialise, which raises both skill levels and efficiency. It brought people from different lands together, co-operating rather than competing over resources.

I think that a lot of social movements, political movements, powerful ones - certainly they form, collectively, an idea of the truth which becomes hard to question. It becomes a dogma, and from the inside it starts to look like common sense.

If we find it hard to believe that winning millions might not be so lucky after all, we just don't have a good enough imagination. If I fantasise about winning the lottery, it doesn't take long before all sorts of worrisome potential consequences occur to me.

Anger clearly has its proper place at work, which is neither wholly absent nor ever present. The manager who is an emotional blank is just as hard to work for as the volcanic boss, and both can do great harm by setting an unhelpful example for what kind of emotional expression is expected and accepted.

Indeed, without emotion it seems unlikely we can even have morality.

I never thought I was cut out for a life of crime. I even felt guilty when I accidentally stole a Subbuteo catalogue, thinking it was free. But everyone has an inner rebel, and mine has finally found a natural outlet. My crime of choice is that, with a heart as cold as ice and no care for what society thinks, I steal wireless computer network time.

No matter how convinced we are that someone is nasty, evil or just plain criminal, if they have not been convicted of any crime and support views that are upheld and defended by many law-abiding citizens, the only way to tackle them is through democratic debate.