I was watching an episode of 'Secrets of the Dead' in which they covered the first millenium A.D. explosion of Krakatoa. In the "nuclear winter" which followed in the next two centuries, environmental phenomena such as droughts followed by floods, blood rain, summer frosts etc are documented.
The Marib Dam's final destruction/wont of repair dates from this time. This was accompanied by a population shift from the Yemen to the centres of Mecca and Medina, and the boom in the spread of Islam. But what if the dam were repaired or isn't destroyed? Would the environmental fallout from Krakatoa mean that the OTL occurences were a foregone conclusion? How might the survival of the dam (and the lack of population migration if it does) impact the world? What would a surviving Yemeni state look like at this time?
The Marib Dam's final destruction/wont of repair dates from this time. This was accompanied by a population shift from the Yemen to the centres of Mecca and Medina, and the boom in the spread of Islam. But what if the dam were repaired or isn't destroyed? Would the environmental fallout from Krakatoa mean that the OTL occurences were a foregone conclusion? How might the survival of the dam (and the lack of population migration if it does) impact the world? What would a surviving Yemeni state look like at this time?