Who’s doing the best? Islam. The only thing that’s stopping them is that they’re not as technologically advanced. But other than that, they have everything.
islam suffers from islam.
Culturally, politically, economically, morally, technologically, socially, basically everything that matters, they’re in the bronze age at best. What little they are capable of is to co-opt western advances for their medieval cause. A large and dangerous bunch of wastrels incapable of managing any country well.
Islam isn’t even a contender in this race. What Islam has is unbounded fervor in a misguided message, acouple of gripes, and loads of weapons from the discount bin at the five and dime.
They never had the necessary societal infrastructure for inventions and innovation.
Well, unlike the examples of Russia, China, the US, and Europe, the Islamic world isn't unified politically. And there's a giant split between Shiite and Sunni.
But Islam is doing the best demographically, both in fertility rate and in invasion via migration. The migration part we can put a stop to in the West, if we only have the will.
Our low fertility rate is something we in the West will have to address, with or without competition from Muslims. (Also, Muslim fertility may drop as their countries become more developed, as has happened elsewhere in the world.)
But ultimately the invasion by migration is the key:
• If our fifth column keeps us from stopping the migration, we are doomed.
• If we do stop the migration, things will work out OK — we can defeat the Islamic world militarily as long as we're fighting only an external threat.