My greatest joy as a father is to see our children growing up and growing independent, and becoming brilliant ... But also every now and then needing me for something and remembering where I can fit into the world. And one of the great joys you realize is that you need them ... You work for their smile. You work for their joy.

Boy, being a parent is a hard job, I think, because in parenting you want your kids to like you. Too much sometimes. It’s a hard line to find between doing what’s necessary to give them the tools to be good kids and make good decisions and all that, versus just completely not giving them a chance to accomplish anything because you do everything for them. I kind of feel like it’s okay if these kids go out and make a few mistakes, because they’re going to learn. The last ten years have been interesting, because I’m a stepparent to three kids, and I’m a father to two kids, an older and a younger. And it’s a real interesting dynamic.

I love being a father. I think there’s a great lie that we tell kids that pleasure creates happiness. Young people think: “Oh, if I get this, I’ll be happy.” But in a lot of ways it’s meeting your responsibilities that makes you happy. For me, I’ve just found that feeling like I’ve done a good job with the kids is a real source of happiness for me.

Being a father teaches you very quickly that you are not the center of your own universe. That’s one of the gifts of having to wipe poop!

I’m proud any time that I see a toxic chemical process, something that produces toxic waste or requires precious metals, which have to be mined at terrible environmental degradation costs — I’m proud when I see that replaced with a clean, efficient biological process that doesn’t produce those things. And we have to do that a million times over in order to move away from our addiction to this old-fashioned chemistry that we do.

I realized I took ideas from philosophers like Dan Dennett. I took ideas from evolutionary biologists like John Maynard Smith. I took ideas from people who were trying to implement evolution for things like RNA, so people like Jerry Joyce at Scripps. I took ideas from lots of people who could explain their ideas well, so I’ve been influenced by many. I’ve built my ideas on the contributions of many. And, of course, that’s what evolution does. It mutates and recombines what’s already there. Nothing comes out of nothing, right? It all comes on the back of what was there.