Bret Devereaux

The Roman Empire produced cultural convergence outside of Italy, but unevenly. It is not clear that the Romans themselves ever intended to do so, but it became on of their great strengths: getting people of other cultures to buy into Rome.

The examples I love to use when I teach are second century mummy portraits from Egypt - Egyptians often freely mixing their own styles with dress that marks them as Roman citizens. E.g. https://www.britishmuseum.org/research/collection_online/collection_object_details.aspx?objectId=119830&partId=1&searchText=Fayum+mummy+portraits&page=1 …

The new identity (I am a Roman citizen) doesn't replace the old one (I am an Egyptian man), they layer over each other (I used a man for the example above, but female mummy portraits show the same trends). You can see this in many of the provinces - Egypt just has great art.

Yes, sarah bond should have been nuanced like this, instead she was as simplistic as Molyneaux. A scholar should aim higher than that

I think you may be missing the precision in the term 'auxiliaries,' meaning non-citizen troops drawn from the provinces (it doesn't cover citizen troops recruited in the provinces or non-citizen troops recruited in Italy). Her example is actually quite specific and spot on.

No that's why I pointed to the importance of ethnic cores in multiethnic empires

Social organization does not scale up infinitely, especially before mass media (e.g. printing press, check out Imagined Communities). Consequently, manpower lies in effective heterogeneity in the ancient world.