You know, I started my career in politics in 1967. I'm not new to this. I did not just fall off the Christmas tree. I understand the world is complex. I know that there are people out there who want to hurt other people.

We tried war, we tried aggression, we tried intervention. None of it works. Why don't we try peace, as a science of human relations, not as some vague notion - as everyday work.

My philosophy comes from a worldview that looks at the world as one. It's a holistic view that sees the world as interconnected and interdependent and integrated in so many different ways, which informs my politics.

We have weapons of mass destruction we have to address here at home. Poverty is a weapon of mass destruction. Homelessness is a weapon of mass destruction. Unemployment is a weapon of mass destruction.