why would islam butterfly away if someone conquered arabia 700 years earlier?
how would that stop the annoing millenial trend of midleastren monoteism?
would that buttefly away gnosticks and quasy-christian sects?
and aniway why put so much importance on a single religion? for ewery religion that suceeds theres 10 exactly alike that fail for reasons not ewen important enough to be noticed... butterflyed away as it is said
so for ewery muhammed theres another 10 men in mid-life chrisis going out for some alone time in the desert and talking to some god or other
as the nature of any given religion is dictated by the cultural backround in wich it emerges any hipotetical arabic monoteism would look much the same, just as any hipotetical hebrew monoteism looks basically the same
I' don't think this HAS to happen. The Arabs weren't monotheistic before Mohammed, and they hadn't been monotheistic for a really long time. Wtihout mohammed, thy'd probably have stayed as they did.
The Berebers, who lived in a similar environment, weren't monotheistic before converting to Islam, even if they had been in touch with a monotheistic faith for centuries.
So, I don't think that the environment and the culture determinate automatically what type of religion a people will have.
on the other hand the unification of arabian tribes was a pattern seen many times in asia, with many numerous ethnick groups devided in tribes, wich, once united, would amass huge military potential and quickly expand to other territories
Here I do think the environment plays a significant roll.