China is regularly hailed as a potential new superpower, with certain commentators citing its rapid economic progress, growing military might, very large population, and increasing international influence as signs that it will play a prominent global role in the 21st century.[18][217] Others, however, warn that economic bubbles and demographic imbalances could slow or even halt China's growth as the century progresses.[218][219] Some authors also question the definition of "superpower", arguing that China's large economy alone would not qualify it as a superpower, and noting that it lacks the military power and cultural influence of the United States