“Theory and practice” is a common phrase. We've seen a lot of writing on theory, but what about that other word? Peter calls it "the dark matter of the social sciences" - Practice. It applies to pencil-pushing, educating, heart surgery, sailing, golfing, and anything you can do with purpose. Peter and Dave take you into a world of thought that couples work and play, purpose and routine, life and legacy. In a world of white-water, On Practice is the raft.