It's pretty clear that we need a whole new playbook for strategy, and Erich Joachimsthaler has just published a thought-provoking new book on this very topic. While strategy used to be thought of as the property of a firm, the winners today are building what he calls "interaction fields" where value comes from the velocity of transactions partners can create between customers and suppliers and other value-system members. In this thought-provoking #FridayFiresideChat​, the two of us draw the contours of what an entirely new way of thinking about strategy looks like.