(Chicago is mentioned as having been totally destroyed and there is no intention of rebuilding  it; rather, the plan is to totally raze the ruins and use the land for agriculture - pending which, the vast abandoned ruins are being used for all kinds of nefarious activities). The United Nations, re-founded after the war and much stronger than in its earlier incarnation, is in the process of making itself a true World Government.
(Chicago is mentioned as having been completely destroyed and there's no intention to rebuild it; instead, the plan is to thoroughly demolish the ruins and use the land for agriculture - pending which, the vast deserted ruins are being used for various harmful activities). The United Nations, re-established after the war and much stronger than in its previous form, is currently working on becoming a true World Government.