My friend Will Wilkinson has
an excellent piece about charges of"Social Darwinism" against policies designed to increase ownership at The American Spectator. One highlight, referring to a recent talk by Barack Obama:
Modern market societies -- ownership societies -- are the paradigm of interdependent, mutually advantageous cooperation, and are as far as can be imagined from the society of atomistic predators Obama invokes to stir the disdain of the fresh-faced graduates of Knox. Market societies -- ownership societies -- are wealthy because they rely on and reinforce a high level of social trust and norms of cooperation.
Along the lines of using Kelo as a way to talk to the left about the importance of property rights, emphasizing the cooperative nature of markets is another possible strategy.