Following this line of thought I would assume America is chasing Europe on their imperialist fancy, Europe (modern) those of the British, the British chasing Romes fancies, Rome those of the Greeks, the Greeks those of the Egyptians (and Persians?) and the Egyptians those of Sumer. This probably goes on though noone left writings before the Sumerians (but my knowledge is fague here).<p>I would also assume the invasions e.g. of Korea by Japanese before 1853 where not imperialist by intention.