Once states can extend their monopolies over vast expanses of land and cultural regions, states are more easily able to increase their taxation and regulatory power without danger of losing significant amounts of tax revenue due to migration.
Crime is increasing in American cities, but don't count on police to protect you. The Defund the Police movement has less to do with that than most people think.
Einstein might have been one of history's most brilliant men, but even his great mind could not have made socialism work. Unfortunately, he wasn't smart enough to see that.