It has to be an actress like Marion Cotillard [in Allied] because there are so many levels to it. It's set in the Second World War, when lots of people were doing things that, outside of a war, you wouldn't do, like killing and dropping bombs. She's doing things that one wouldn't approve of, but it's war.

What I wanted to do [in Allied] was get two characters who fall in love for real, across the barricade, and then it transcends the war.

[The film Woman Walks Ahead] is from a long time ago. I wrote that ages ago. It looks gorgeous and Jessica [Chastain] is so good that I've got high hopes.

I think certain periods of history don't get dealt with because I think historians, and it's their job, but they look back and look for patterns. They look for sequences and they look for reasons, and certain periods of history don't fit with the general pattern of 1500 to the 20th century, during which there's the creation of the United States. At this time of 1814, two nations who would eventually become close allies were at war with each other, so it doesn't quite fit.

I think the East India Company represents what we would think of as a very modern approach to the world where everything was counted, every penny was counted.

[2015] it's a time that there's a clash of ideologies, similar to the Cold War. I think that a story like this has been waiting to be told, and I think it's a fresh look at the whole earth-shattering business of the collapse of the Soviet Union.

When you're watching, I find two things happen. You either watch a film and it's really good and then you think, "Why can't I do that?" Or you watch a film and it's not good, and you think, "Why am I doing this?" So either way, it feels like being at work.