Originally Posted by
LittleFuzzy
An empire if a form of political organization in which the "metropolis" exercises control over diverse (heterogenous) actors through formal annexations and/or various forms of informal domination. That's the short definition from the International Encyclopedia of Political Science. As it goes on to mention, efforts to make it more specific or precise tends to come at the expense of consensus among political scientists :)
As for what it is in Johnsons's message that is "better communicated" you have failed to provide a contrast. Better than what? I laid out what merits their mention, they are the only other two "credible" attempts at unifying Europe in modern history. Further, the UK (or Britain, in the case of Napoleon) was the single major European power which successfully avoided integration in both throughout their attempts to unify the continent that is involved in the EU now. As I said, the only other candidate for comparison is the HRE and it's even crappier. You may want there to be no comparison whatsoever, for the EU to be treated as sui generis in every particular but. . . that is AT LEAST as inaccurate as the comparison you dislike, particularly in the mentioned British context. Johnson didn't say a word about either Hitler's nor Napoleon's shenanigans, he referred to what both of them tried to build.