No time to do this justice, or be verbose, as I am want.
First, I assume two items:
1. Panspermia from a single source did not occur. Life here and there are two separate home-grown events.
2. The evolution of simple chemicals to complex organisms.
Regardless of chemistry, genetic make-up, form, function, color or texture, evolution here, there and everywhere must occur in the same manner: competition for scarce resources, prey-predator relationships, parasitic/symbiotic relationships and, especially since we are talking about a world with intelligent life, a high diversity of kingdoms, phyla, classes, etc. The time periods involved would make this a necessity.
To evolve intelligent life and have it survive and dominate a species takes the same evolutionary processes as any other trait ... necessity. Intelligence would mean nothing and would not advance if it did not convey a survival advantage over the competition. With intelligence comes curiosity, planning, complex symbol manipulation and the like, all of which would not survive in a placid environment. Only the crucible of deadly evolution could grow and strengthen those abilities needed to survive long enough to develop the mental strength to ponder their own existence and develop the knowledge and skills necessary to communicate over vast reaches of space. I cannot due this point justice in this short message and must leave this as given.
The development of societies must have, as we have experienced here, begun with small groups which leads to competition among these groups. It makes no difference what the species actually is, the crucible of evolution requires survival through competition as individuals, then small family groups, then tribes, then whatever the alien equivalence of village might be.
Intelligence denotes curiosity and a search for answers. Absent the sophistication of millennia of accumulated knowledge the answers must of necessity be explained by the great powers evident in their world. I would be very surprised if an emerging intelligence did not attribute to these great powers the same spirit they themselves felt as a result of their own consciousness. Spirituality is, IMHO, a necessity of emerging intelligence. The step from there to beings possessive of this spirit is, again IMHO, an inevitability. The gods are born.
We know that the eventual personification of the gods took place within our species due to the great tribal leaders being deified in the centuries after their reign. We might expect the same in an emerging intelligent species anywhere.
We can expect that as alien societies were scattered over a planet, as ours were, over the millennia a cornucopia of deities would emerge and die away along with their respective rites and dogmas. Religious specifics would be as vast and varied as we see here.
I would not expect any alien intelligent society to be sans religious history. A history of scattered hodge-podge sects, as we have here, would be expected and, I would further expect a strong, if not a majority, of atheistic tendencies in this alien society as the knowledge-base grows in depth and sophistication.
No more time. I’ll post this half-baked anyway and be gone a few days. Sorry.
™ Version 4.2
