As for the "degeneration and chaos" of the Arab society in the 7th century, I'm writing that soundly under Ex post facto embellishements to make the Prophet's de facto conquest of the peninsula look better; such PR pieces always tend to get written about the exploits of great leaders, at least in societies that do not for example consider the act of succesful conquest itself to be all the justification and glorification it ever needs (as amongst many "barbarians" and steppe peoples). AFAIK the Arabs were simply carrying on like they had for a very long time, in a somewhat uneasy symbiosis between the desert nomads and the more settled dwellers of the mercantile urban centers and the petty squabbles between rival tribes and clans over old feuds and conflicts of interests.

Business as usual really for such ecologies. The introduction of Zoroastrianism and Christianity to the side of the older-established "pagan" religions and Judaism hadn't changed much, by what I know of it.