Hey, you know how the Prophets of Bajor exist outside of time and didn’t understand how linear time works until Benjamin Sisko from Earth taught them? (Let’s ignore for now if Sisko taught them at some point, they should always have known for now.) And you know how they also give visions of the future to their worshippers on Bajor? Well, what if Benjamin Sisko’s physical appearance provided the beauty standards that made Bajorans evolve to look like humans?
Yes, I’m at it again, complaining about how too many aliens in Star Trek look like humans. But this time I’m providing a reason it works. Sure, canonical Star Trek has already provided an excuse (which I do not like) for why so many aliens look like human, and they’ve doubled down on that excuse in recent years. But I find my theory here more interesting in this case.
There already exists a fan theory, one that I had nothing to do with and am only using here as fodder for my own theory, that Cardassians and Bajorans are a single species that has diverged in evolution after some of them made their way to Cardassia from Bajor. I’m not gonna bother looking it up again for this post, but that idea is based on evidence such as Bajorans and Cardassians being able to very easily produce offspring together (many Trek hybrids, notably Vulcan/Human ones, are mentioned to require technological intervention to make a viable offspring, but Bajoran/Cardassian ones have been shown to happen as mistakes). Also, there’s the matter of a natural space-warp thingy that just happens to bring primitive spaceships from Bajor to Cardassia where those ancient Bajoran astronauts (who were active thousands of years before human ones) could have crashed and lived out their days starting a new species in the process. There may be more evidence, I don’t remember, but the gist of it is that the ones who wound up on Cardassia evolved into Cardassians.
What PDR is suggesting is: what if the ones who ended up on Cardassia are actually closer to “original” Bajorans than “modern” Bajorans are? Those on Cardassia are outside of the direct influence of the Prophets, but those back on Bajor are getting the visions from the beings who know the future. And some of those visions are surely of the Emissary, the great religious figure from the future who is none other than Benjamin Sisko. And if even a handful of Bajoran artists get such visions, they’re gonna make art that depicts a figure like Sisko and the people are gonna revere that figure. If that figure looks human, humanoid necks and foreheads and skin tones are gonna be appealing to the people. Natural selection would happen and those traits would be selected more often, passing along genes that hew closer to human traits. In the thousands of years of separation, Cardassians surely evolved to their new world as well (maybe that’s when their love of heat came into it), but I definitely think that Bajorans used to look closer to Cardassians back in the day.
The only flaw with this theory (the ONLY flaw, I will not be accepting any other flaws because as I so confidently say there are no others) is that the visions from the Prophets that we usually see don’t typically involve figures from the distant future, but instead people already known to the person having the vision. But hey, it only takes a couple of visions to a couple of artists over the millennia to start the thing rolling. Once one artist is doing it, others could emulate that one, and before you know it smooth foreheads are just the most popular thing and the divergence has begun.