FS, obviously. The place is mired in layers of centuries-long social and racial conflict that is still problematic today; however, that same history has awarded us a unique culture as the most "Southern" place on earth and we have a literary, artistic and musical heritage that punches far above our weight.
Yeah there's a decent argument to be made that, weighted for population, Mississippi is the most important state in American culture, or at least in the top 5. Certainly so for music and literature.
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