Every political event since 1919 added new irreversible categories of stateless people

Evidence

Much more stubborn in fact and much more far-reaching in consequence has been statelessness, the newest mass phenomenon in contemporary history, and the existence of an ever-growing new people comprised of stateless persons, the most symptomatic group in contemporary politics. … Their existence can hardly be blamed on one factor alone, but if we consider the different groups among the stateless it appears that every political event since the end of the first World War inevitably added a new category to those who lived outside the pale of the law, while none of the categories, no matter how the original constellation changed, could ever be renormalized. — Hannah Arendt, The Origins of Totalitarianism, 683