If France had remained a republic instead of Napoleon being proclaimed emperor, might the political reforms in Russia under Alexander I have continued?
Was it Kashmir or Sarhad/NWFP? There is an area west of Peshawar that the Mughals called the Jewish Desert, and there exists lore around the alleged Israelite origins of the Pashtuns.
It won't stop with Virginia but won't spread to other states super quickly either. The interesting thing I see here is the debate over free versus slave states and new admissions to the union.