No.8810
Is he wrong?
The US was only a unipolar power from 1991 until Putin started Russian advancement into former Georgian and Ukrainian SSRs
Now China and Russia are nuclear powers on par technologically and soon to be economically with control over African resources
previously the UK was unipolar from 1815 until the German Unification and American Industrialisation of the turn of the 20th century (~1890 to 1914)
before that it was the Spanish under Carlos V & Filipe II