Conrad assiduously elides the draconian measures which the Romans had to implement to do that.
I don't think that the modern U.S. would be keen on, say, the mass-crucifixion of intransigent newcomers slow in adopting our cultural values.
Regards,
The point is simple - the ‘waxing and waning’ of civilizations is a product of social and institutional systems, not genetic blueprints.
Whether Rome used crucifixion or modern nations use legal, economic, and educational systems, the mechanism of change is the same: when a population is held to a clear, consistent set of expectations and granted access to the same tools and systems, they change.
Your entire argument is predicated on the idea that these populations are inherently incapable of adapting, regardless of the system they are in. I am pointing out that the ancestors of modern Europeans were once considered just as ‘unfit’ as you claim others are today—and they proved you wrong.
If you believe that the difference between a ‘thriving’ civilization and a ‘primitive’ one is purely biological, you have to explain why the ‘biology’ of the British shifted so drastically from the Roman era to the Industrial Revolution. If you admit that their growth was due to the ‘software’ of their institutions, then you have effectively admitted that your racial determinism is wrong.