What is the origin of nonNon-natural grammatical genders in Indo-European languages? (assuming that there is a single origin, if there are many, what are they) How and for what purpose did it develop?:
What is their origin (assuming that there is a single origin, if there are many origins)? Or what are the origins?
How and for what purpose did they develop?
At a glance, there doesn't seem to be a point in differentiating the inflection for adjectives and verbs related to the moon and the sun, for example.