A lot of grammars (or at least traditional ones) explain that impersonal verbs about weather (lucescit, pluit etc.) used to have deities for the subject. A phrase like this:si hominem fulminibus occisit is usually analyzed as having Jupiter, the subject noun, omitted. I am just wondering if a nominative noun was taken out for some reason or it was not there at all in the first place. Is the latter not a piece of evidence for, for example, a trace of ergative constructions in Indo-European? Edit: Omission of the deity subject seems to me as probable as the old myth of Proto-Indo-European having no complex sentences. I am not however getting polemical or anything because I don't have any solid argument for my impression. I am open to opinions and may change my attitude accordingly.