So here’s a dilemma for a principled locavore: Walmart, long considered the enemy-in-chief of mom and pop shops and small, unique economies, is now positioned, by virtue of its sheer size and a new local initiative, to do a large amount of good for regional farms and local eating. What do you do? Vote for local food with your dollars, and shop at Walmart? Or do you still avoid this corporate giant at all costs? This is the dilemma considered this month by Corby Kummer of The Atlantic.