It... doesn't quite work that way.
Look at RL: One reason for the European dominance ~1600-2000 was that Europe had a disproportionally high population compared to the rest of the world. Africa and Asia saw huge population booms in the 19th and 20th centuries; before that the colonial empires rule vast expanses of territories but not actually that many people in them. This, of course, has changed these days, and Europe's percentage of the world population has continously shrunk despite remaining (together with N.America) the richest part of the world.
Think about it: Right now we can allow for frankly insane population density levels due to black soil, healthcare and a vast administration service distributing food. But we're pretty much capped out on that development. So once other realms get those goodies as well, they can very well catch up to us. Just like IRL, areas in which hardly a human lives now will eventually reach similar population densities to us. So I think it's justified to say that we'll probably never again rule such a large percentage of the world population, except maybe for a little while if we maybe do absorb the HK.
Actually, a lot of that isn't nearly so replicable:
-Black Soil - This is the natural quality of floodplains and steppe soils, while also requiring a certain very high level of social investment into waste disposal rarely seen until the modern age. While every city eventually devised some form of garbage disposal, the level of central effort needed to gather and systematically burn your waste isn't naturally arising, and while manure fertilization was widespread, most other forms were erratic in implementation.
-Irrigation - This is wholly replicable, but ironically, due to many civilizations springing up around floodplains first, they never had the impetus or the geography to move beyond basic irrigation systems into canals and dams.
-Terrace farming - Generally developed by hill folk, as with the irrigation thing, civilizations living on floodplains never had to need to learn how to cut hills into farmland unless they somehow had no space to use(which was pretty rare on floodplains)
-Chinampas - It does take somewhat specific terrain utilize, and is significantly counterintuitive to other farming methods. It's basically for people stuck next to floodplains or lakes who somehow still lacked much arable land to figure out.
Our health techs were largely fallout from the Sacred Warding project's infrastructure and the Carrion Eaters that spawned from that. I don't expect them to be replicated on a significant scale for a long time either.
In other words, most of the agritech I don't expect to be caught up to any time soon.
However, it makes the statement no less true. Look at the wars over our local floodplains for soil which matches all the work we put in through natural forces alone.
How long before their local polities settle out into a Top Dog that actually developed the sort of culture needed to hold their gains?
The Khemetri did with the Djeb, though we know from RL history that the struggle to dominate and control the Nile was extremely long and bloody.
@Academia Nut I was hoping we could do multiple GA actions, we're at Red Tech (what does that do?)
Tech is just available artisanal workforce