Long-run Anglo-European Paranoia

It appears that the nations legacy to the Roman Empire (and possible earlier) have made a kind of enclave out of Europe, in which they hope to defend that legacy against the global globalization of all nations.  This, urgently interpreted, seems to imply that England and Europe are under imminent threat from bombardment with missiles of all kinds, including nuclear.  Yet the threat consists mainly that cultural diffusion will ensure an eventual uniformity to Earth's societies.  At any rate, if that future is not the cause of nuclear paranoia, the extent to which eventual global homogeneity should be at least determined in order to ensure that present day planners know just what to subtract from their fears.