UHMMM AKSHUALLY (🤓) a single man cannot own all of earth, given how liberalism is heavily propagated and maintained by concepts such as nationalism and by extension xenophobia, racism, bigotry - all that fun stuff.
If a single man or an entity tried to create some pan-cosmopolitan world where every piece of land is under a single world-wide country, you bet your ass there's gonna be countless of reactionary national liberation movements to proclaim sovereignty.