Cultural warfare: Who is winning?

If you follow the top scientists you would know that genetically we have hardly changed much in evolutionary terms in the past thousands of years yet our societies and our ways of life are completely transformed. The primary reason theorized for this is that we have moved from biological evolution to a far faster cultural evolution. However, if cultural evolution is real then it would imply that some cultures are more likely to survive and thrive long term than others, or possibly that multiple cultures compete with each other in a healthy stable ecosystem.

I am personally a believer of the former scenario, a culture completely dominates a region then splits off into multiple branches of that similar culture which again fight to form the most perfect variation which again splits off into multiple even more similar threads compared to the past threads.

Currently the way I see it Japanese culture is going to die out over time. It's too isolationist with a dying out population.

Other than that western culture is the most widespread and the one that is dispersing the fastest around the world even today. Chinese culture is limited to the mainland. European cultural norms are limited to Europe, Indian ones to India. However even Islamic cultures of the middle east are starting to become more westernized in sentiment.

So do you think western culture would spread all the way till the border of Russia in the East, and all the way to the bottom of Argentina in the South, then break off into 2-3 pieces? Or do you figure that the current cultural lines are pretty much set or that the Eastern world is suddenly going to figure out cultural expansion and win?

What in your individual opinion is the most successful cultural tradition for the future in terms of cultural evolution and future thriving?

I think it would be either conservative western with some tweaks over time or Indian culture which is harmless to the point of easy spread with very high populations all over the globe.