The plague not only isolated Europe, but it also cut off the Mongols in Persia and Russia from China and Mongolia. The Mongol rulers in Persia could no longer procure the goods from the lands and workshops they owned in China. The Golden Family in China could not get its goods from Russia or Persia. With each group cut off from the other, the interlocking system of ownership collapsed. The plague had devastated the country, demoralized the living, and, by cutting off trade and tribute, deprived the Mongol Golden Family of its primary source of support. For nearly a century, the Mongols had
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