Why did justinian i fail to regain all of the formerly provinces of the old roman empire

As we all known that Justinian's attempts to restore peace and stability in the territory of the Byzantine Empire turned into cruelty and bloodshed.

Therefore, the restoration of the Roman Empire required huge sums of money, and the people could not bear the constant taxes on military expenditures. Captured territories resisted politics of Byzantium, there constantly erupted uprisings. The historical development of the country cannot be stopped or rotated at will. It is impossible to return the old orders, especially without the support of the local population.

a, he promoted disarmament

du boi was considered a radical because he wanted the immediate end for segregation. the biggest different between him and booker t. washington is that, even though washington believed that segregation should be considered illegal, he did not believe at all that a law was needed to keep blacks away from whites and that this would be something natural (to have the races apart) for a long time until society adjusted, while du boi believe that agitation was the only way to end segregation.