Most people assume because I'm an actor that's all I know about and care about, I'm actually a camera geek and a film geek. I grew up making short films the same time I was acting. For me, it's a motion picture, not a play. I'm just as interested in what the camera department is doing and world building through costume design and production design as I am in acting. I think all good directors do that whether they're an actor or not.

The first idea of Captain Fantastic was a pretty radically different one. The genesis had to do with parenting and questions about parenthood and fatherhood specifically. I have two kids and I was grappling with what my values were and what I wanted to pass to my children. So I was positing different kinds of parents and different ways of parenting. I played with various ideas - very permissive parenting, very restrictive parenting and then I came up with the character of Viggo Mortensen, and much of it was aspirational, some of it was autobiographical.

I think being a good parent means that every day is a different challenge. It's about mindfulness and trying to be present. I think life goes really quickly and it's very easy to be tuned out, and not be present. That is what I've learned in my parenting experience, and I continue to be mindful of it.

The foreign audiences are somewhat surprised and happy to find an American film that asks questions about American culture. There's a certain kind of cultural imperialism that we practice. Our films penetrate every market in the world. I have seen and have had people reflect to me, maybe not in so many words or specifically, but I get the subtext of it - they're somewhat charmed and surprised and happy to see an American film reflect on our culture. Because they see other cultures reflect on our culture but they don't see US culture reflecting on itself in quite the same way.

I think one of the most difficult things about the lifestyle is that when it's winter, and there is no running water, you still have to go outside to use the bathroom. You know, we all live very comfortable, no matter what socio-economic level we're at - if you have electricity and running water, you live better than the kings of the 16th century.

Most people assume because I'm an actor that's all I know about and care about, I'm actually a camera geek and a film geek. I grew up making short films the same time I was acting. For me, it's a motion picture, not a play. I'm just as interested in what the camera department is doing and world building through costume design and production design as I am in acting. I think all good directors do that whether they're an actor or not.

The real truth - like anything, you have an idea about something you might write and it changes. People reflect on it or you get other ideas and maybe your original idea is radically different than how it ends up being. It's not a theorem. You don't sit down and prove something. You start with an initial idea and it grows and grows. The math of the narrative changes. In some ways your original document and what the film ends up being are quite different.