You all really have to stop being in denial. We're going to start applying modifications to human germline genomes in a few years, and we're going to modify for actual superiority and material efficiency.
Small males are superior to large ones and large females are superior to small ones. The small males will be 3'5"-4' tall, highly athletic, dexterous and agile while requiring far fewer resources and land to maintain. We can mass produce males that are both cheaper and of higher quality. The women will 6'5"+ who superovulate and produce litters of babies at a time. Smaller women can not do this as they do not have enough space in their belly or energy reserves stored in their body to do so without becoming fat (which is bad for pregnancy) and overall negatively affecting the cognition of the offspring.

This breed is superior by all relevant metrics. They spread faster than any other phenotype while using fewer resources and being hugely advantaged in economic power and military might.