The Umma does not produce sufficient surplus of its own to be able to expand and if raiding and piracy are prevented or totally defeated then it cannot wage its Jihad. The Umma needs only sufficient production to support a tiny ruling class in splendour and the millions at bare subsistence. The People do not produce any more than for their survival because the Sultan or the Bey confiscates everything else. Commerce is carried on by the rulers and minimally by others who lose most of their gain to the Sultan. That is all why when Israel turned over the lush and profitable greenhouses the Israeli residents had built in Gaza to the arabs they destroyed it all. They could not profit from the operations but they could take rare and momentary pleasure in the destruction.
The Umma needs only sufficient production to support a tiny ruling class in splendour and the millions at bare subsistence. The People do not produce any more than for their survival because the Sultan or the Bey confiscates everything else. Commerce is carried on by the rulers and minimally by others who lose most of their gain to the Sultan.
Sounds like the missing link, policy wise, between our OneWorld would be masters and the IS, no?