Madness is the exception in individuals. But the rule in groups.*

Why normal, sensible people do the strangest things.

There was rioting on the streets of Leeds (UK) yesterday.

The people I watched gleefully smashing a police car didn’t appear particularly oppressed to me.** They were laughing and joking in their stylish shorts and t-shirts.

But what would I know? There are, I’m sure, deeper social issues at play here. What I do know is this:

When British statistician Fra…