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Throughout world history, people seeking dominion over other people have always claimed that their desire for ultimate power served some greater common good.

Yeah.
And it has a precise name.

Fascism

It is impossible to grasp the true concept of Fascism without returning to an age of clarity and facts vs opinion and editorializing; before personal definitions, euphemisms, the puerile, self-serving age of "depends of what the definition of "is", is.
According to the Encyclopedia of Philosophy, Collier-Macmillan, Volumes 3-4, 1967, pp182-183 et seq.:

...whereas Liberalism, socialism, democracy, and the other progressive movements of the nineteenth century had asserted the rights of man, the selfish claims of the individual, Fascism sought, instead, to uphold the moral integrity and higher collective purpose of the nation. And whereas liberalism saw the state simply as an institution created to protect men's rights, fascism looked on the state as an organic entity which embodied in itself all the noblest spiritual reality of the people as a whole. Fascism opposed the laissez-faire economics of the capitalism and the bourgeois ethos which went with it. But fascism equally opposed socialism, which preached class war and trade unionism and thus served only to divide the nation. Fascism could tolerate no organized sectional groups which stood outside the state, for such groups pressed the supposed interests of some against the true interests of all...
... fascism set up corporations which were designed to integrate the interests of particular trades, industries, professions and the like into the wider harmony of the state.