For me, as I suspect for most people, there comes a point where you have enough. If you've got £20 million, why keep going until you've got £100 million or £1,000 million? Does anyone need another vast yacht or private jet or a house full of gold?

My father left school at 14, my mother at 13. My father was clever and well-read. He took a newspaper, always watched the news, discussed it all the time.

You know, you can be really quite subversive in popular fiction, which is capable of taking on big issues of politics, war, the rise and fall of commercial dynasties.

Writers and journalists tend to be simplistic about politics when, like all other areas of life, it's more complicated.

If one tries to think about history, it seems to me - it's like looking at a range of mountains. And the first time you see them, they look one way. But then time changes, the pattern of light shifts. Maybe you've moved slightly, your perspective has changed. The mountains are the same, but they look very different.