what is the seed? What is this that's been given to me?

To be honest, it’s always different. I never know what I’m going to do when I get a new project! Sometimes I’m going to get a bunch of trace paper, I’ll make a silhouette and then just go through variations until I hit something nice. Maybe we put those sketches up on the wall. Or maybe I’m going to print the full-scale silhouette of this thing, or I’ll do it in 3D modeling… And on and on. The thing that’s consistent when I am in creation mode is that I have to be pretty particular about my schedule. I have to stay spiritually in tune. Exercise is really important for me because truth be told, I can have a lot of nervous energy that comes out at the beginning of any project, like, I have no idea how I’m gonna do this one! I don’t know what the process is going to be for this one, I don’t know how long it’s gonna take.

An idea comes. Scripts are organised ideas. When you read a script, it comes alive in your head. And that aliveness in the head is like seeing it and hearing it and knowing it. Or if an idea comes from outside, boom, you catch it in your brain and you see it and you hear it, and you know it. You sometimes fall in love with these things. All you do in cinema is translate those ideas. They talk to you, so you just stay true to the idea and translate it as good as you can.

It’s like a kind of boiling kettle, you know: you don’t want to make your tea until the kettle’s boiled and it’s the same thing, you don’t want to make your movie until you’re boiling with something you need to say. And theater, for instance, has always given me the opportunity to wait for that moment. It’s the same with film actually — film has given me an opportunity to wait until I’m ready to do a play. One fuels the other. Even the decision to write and make 1917 , weirdly, came out of doing the Bond movies.

My very wise and politically savvy 17-year-old daughter says I get too emotional about political issues. I think she’s right. She knows that if she sees me race across a room, I have just read something about Trump. Turning ideas into feelings is the thing an essayist is supposed to do, but political punditry should probably be more detached.

That’s the book I hope to get written sometime in the next ten years.

Writers we think are all wrong and want to read anyway come in two kinds: those who are good writers and bad thinkers — Christopher Hitchens, Norman Podhoretz, and Gore Vidal, each in his terribly different way, are instances of that — and those who may not be original stylists but who we admire for trying to be better thinkers than they were before, stumbling toward truth from a starting place very different from the one we happened to inherit. I disagree, for instance, with David Frum about almost everything, from Iraq to the legacy of Pierre Trudeau in our native Canada, but never doubt his integrity or desire to tell the truth about the world.

You have to discipline your mind and your heart and not to be unduly nostalgic about those losses.

Writing about how much you love your wife is bad form, it seems like boasting

Well, it certainly influences my manner of writing, because I always see Darwin as a model of the act of explanation and of argument; the morality, the ethics of explanation, maybe.