The Kingdom of All-World was the name given to the whole of All-World, after it was united together by Arthur Eld who sought to bring back the days of civilisation to the people of All-World. Its central power rested at Gilead (In-World).
In its totality, the Kingdom remained for seventy years and finally began to fragment into independent Baronies, which has remained the case up until the present day. See: Inner Baronies, Eastar'd Barony.
It was this breaking down of the Kingdom which brought about the beginnings of The Affiliation, which created a loose alliance of these Baronies.