Chomsky's primary argument in Hegemony or Survival is that the United States government has pursued an "Imperial Grand Strategy" in order to maintain its status as the world's foremost superpower since at least the end of the Second World War. Adopting the term "Imperial Grand Strategy" from international affairs specialist John Ikenberry of Princeton University, he quotes Ikenberry on the nature of this doctrine and the manner in which it considers the "rule of force" to be more important than the "rule of law", thereby ignoring international law.[20] Quoting liberal statesman Dean Acheson, Chomsky asserts that the purpose of this strategy is to prevent any challenge to the "power, position, and prestige of the United States".[21]