It's the big 40, and we're talking about change. It's a surprisingly focussed but tangential episode, in that we know exactly what we want to talk about on topics that evolved rapidly. The question: what one thing would we change about the world? The answer may surprise you. I mean, it may not, but we don't know you well enough to judge yet. This episode's mistakes include:

• The longest intro we've ever done.

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