Challenge: Muslim majority world

Create a non-ASB ATL where the percentage of the world's population who are Muslims is >=51%.
 
Even now with the Islam dominating the middle ages (over half Eurasia) and Christianity dominating the modern era you barely have over 50% of the world following an Abrahamic religion.

I think you'd need a YoRaS kind of situation which is pretty close to ASB. That is, reduce the population of non-Muslims so the world is repopulated mostly by Muslims. I say "pretty close" only because of the "virgin soil" destruction of the Indians shows that kind of thing is possible. I think extending the Muslims conquests even farther than they went becomes extremely difficult but even if Constantinople falls, you will still have huge populations in India and China that are non-Muslim.
 
Chage it to a plurality and then its possible (even plausible given that Muslims often had a manpower advantage against Europe), I would recomend some kind of POD that gets rid of the Muslims falling behind Europe (probably something like removing the sack of Baghdad and Cordoba) so that they maintain a tech advantage and go through an agricultural revolution and industrial revolution first.
 
Global Caliphate in three easy POD's!

1. The Caliphate takes Constantinople, and the Byzantines never recover, fleeing to Syracuse. The Bulgars, Rus', etc. are exposed to Islam, rather than Christianity. Khazaria and Georgia are Ehtiopia-like isolates, maybe.

2. Andalusian victory at alt-*Tours* and the follow-up campaign brings Gaul, Italy, and eventually Britain under Islamic rule. The Saxons and Northmen are exposed to Islam, rather than Christianity. Ireland is an Ethiopia-like isolate, maybe.

3. There is still something like the *Mongol Empire*, but the leading tribes are Muslim. There is a lasting Muslim plurality (or sizable minority at least) in North China. It's not implausible that this empire either conquers for a time or otherwise influences Japan and/or Vietnam, but it's not necessary.

In this world it is Islamic powers (Western, Eastern, or both) who lead the alt-*Age of Imperialism*, meaning that the Americas, Australia, North Asia, and sub-Saharan Africa are at least 90% Islamic.

Et voila.
 
Well, I think that reducing the expansion of Christianity under colonialism gets a long way to a Muslim-majority world. Using today's populations, and a quick bit of looking at Wikipedia, about 480 million people in Africa are Christian, 800 million people in the Americas are Christian, and about 280 million people in Asia are Christian. Combine this with the 1.62 billion Muslims right now, and you get 3.18 billion Muslims.

Out of a world population of 7 billion, the other 320 million can come from Islam moving into parts of the world that it didn't penetrate historically. Muslim Europe would be a cliche and a cop-out but not impossible. There are other places too, of course: parts of Southeast Asia went Muslim while others stayed Buddhist, so a change there could result in more Muslims in say Thailand or Vietnam. The same could be said with increased numbers of Muslims in India and China, though Islam is already pretty successful historically, with about 1/3 of the Indian subcontinent being Muslim. As for China, I don't know how you're going to get more Muslims, but I don't know for certain how a Muslim conquest of China would work out.

So, in conclusion, if Islam managed to replace Christianity during colonization, and all things happened to go well for it, and this history parallels real-life significantly, you can get a Muslim-majority world.
 
Top