During our recent conference on Causal Powers and Social Science, I was able to interview Professor Stephen Mumford about philosophy, metaphysics, causation, powers, laws, and emergence. What followed I found to be extremely helpful in thinking through these complex issues and questions. Why should we avoid the language of causal laws? What constitutes an emergent phenomena? What is the best way of thinking about emergence? And what would possess anybody to become a metaphysician!?