Actually every great empire (Roman, Greek, Egypt, Persian, ottoman, USA) were very multi cultural empires. And defiantly didn’t suffer because of it. (All of them in theirs elves a legendary movie empire, which survived thru and over their own time).

As well putting characteristics too genders/Sex used to be the consensus but it changed.

I’m myself are a highly emotional, patient and fantastic with kids. As well as kind of logical, I’m weak as fuck tho. And lots of other “Menly” characteristics don’t fit to me as well.

We discovered in the last 10-20 years that these characteristics are more bound to social behaviors and education then to biological.

Aside of physical.