The Najd, the Hijaz and the Gulf

The interior and the two coasts it kept reaching. Central Arabia produced no lasting state of its own until the eighteenth century, but it produced the men who took the others: a Kindite kingship made in Yemen, a Qarmatian state on the Gulf that carried the Black Stone away, sharifs holding Mecca for nine hundred years under whoever was paying, and finally a movement out of the Najd that took the lot.

The line below is a time axis. Position on it is date, so concurrency is visible: concurrent polities sit side by side rather than in sequence.

3 sourced edges run between this region and another, to Fatimid Caliphate, Himyar and Abbasid Caliphate. Those are not drawn on this line — a thread that crossed regions would assert a sequence nobody cited — but they are on each polity’s own page.