lingering? alive and fucking rampant id say!
Heres a simple definition of imperial-realism from a quick google:
"IR theory, known as “offensive” or “great power” realism. Russia is a great power. Great powers, the theory goes, guard their security through spheres of interest. The US does so too, in the form of the Monroe doctrine and more recently in the Carter doctrine, which extends America’s interests to the Persian Gulf. If necessary, those zones are defended with force, and anyone who fails to recognise and respect this fails to grasp the violent logic of international relations.
In so far as ideas can actually influence international relations, given the determinative force accorded to geography, economics and military power, the most that one can hope for is to bring decision-makers and the general public to recognise each other’s interests and spheres of influence and pull back from unnecessary confrontation. What realism means in this context is clarity about the underlying structure and a resigned acceptance of its logic."