system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: The world will increasingly politically dominated by cultures with higher birth rates.

The west began dominating the world circa 1700-1800s thanks to improving medicine that propagated the populations combined with high birth rates.

These days western nations have negative natural birth rates, relying on immigration instead.

However, most of the future population growth in the world will come from the Mid East and Africa. 

If a culture like Islamic culture continuously has higher birth rates won’t they eventually politically dominate the world? 

Rereading this, it does seem to read as a bit of fear-mongering but I think it’s a fair and legitimate question.

I guess it’s a question of won’t the cultures that survive in the future be the ones that can propagate the best?
gpt
Any historical theory which attributes Western domination to one single factor is definitely oversimplifying things. Even during the 19th century when European imperialism was at its height, China and India had higher populations than any European country. 

At the present, population is still only one factor that contributes to political dominance. An important one, but not the defining factor.