We Can Conquer It Again:
In the late 19th century, Europeans were 35% of the worlds population, were colonizing 90% of the Earth's surface and had dominion over 100% of the planet.

It unfortunately faded away quickly, but it can come back just as quick. We just need to maintain the deceleration of Non fertility and accelerate White fertility. The former is already occurring rapidly, the latter depends on you starting a White family.