I know it's a bit of a hot button topic among the world of runners who stand at either end of the equator on the issue: barefoot running Vs. shoe running. One is viewed as a throwback to the evolution of humans that spent much of their existence running naturally away from Predators (unless you're Carl Weathers, Danny Glover, or Adrien Brody, who run towards them), and conversely, towards prey (& berries & fruits & such), and the other view is what made Bill Bowerman & Phil Knight richer than finding the road to El Dorado baby! In summation, the argument is that shoes interfere with your biomechanics by forcing them to fit into a broadly researched, pseudo-scientific, mold, while shedding that padding our feet have grown so use to uncovers a long dormant goldmine of human perfection.
So, what happens when we really do lose the shoes...