Before revision: For James D. Tracy, it was the polycentric character of the European civilization that made it hard to maintain "a dynasty whose territories bestrode the continent from the Low Countries to Sicily and from Spain to Hungary—not to mention Spain's overseas possessions".
After revision: For James D. Tracy, it was the polycentric character of the European civilization that made it hard to maintain "a dynasty whose territories bestrode the continent from the Low Countries to Sicily and from Spain to Hungarynot to mention Spain's overseas possessions".