Did naming 'diversity' unnaturally divide us?

The word 'diversity' according to etymology on line is mid-14th century, from Old French diversité (12c.). Before the word existed or was named as such, was there no diversity? Or was that 'diversity' not an issue because peoples naturally lived and worked together? Why did the term enter the English language? Was it at the naming 'diversity' that the false divisions came, that we were pitted against each other, and that we were told that ‘we are different’ from our neighbour? Did we start thinking of 'diversity' as something contrary and divisive at the point when the word was named? Or as humans were we always fighting for our ‘protected’ diversities?