Do you remember the movie War Games with Mathew Broderick?  It had those fantastic 1980′s computer graphics showing a world-wide nuclear strike.  Each strike would have this little dot and before you knew it, the whole map was covered in these dots.  Check out this video that shows the growth of Wal Mart over the past forty years.  Its just like it.

By the way, I am not comparing Wal Mart to a nuclear strike, although I’m sure its critics will happily note that you could also do a map of small retail business concentration before and after a Wal Mart store hits and get the same effect!  Happy watching.

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