Excellent thread once again and as always Slayer.
I'm in the camp that we've gotten here through our own momentum.
We've a fairly nice progressive development timeline of evolution in the fossil record to indicate this, though there are some questionable gaps and
debates regarding how some of the pieces fit together if at all, the progression is still there.
We don't find any indication of remains anywhere in history of any hominid more 'advanced', or more appropriately 'developed', or adapted than we
Additionally, fairly recent, we've indication of a punctuated equilibrium in adaptive development in the human species where we've found indication
that our brains are actually smaller than 'modern' humans 15,000 years ago.
Head shrinking in the 21st Century
That's a pretty huge developmental/adaptive change in a relatively short amount of time compared with what we see in the fossil record.
On a more extreme note, I found this blog that frames research into literally down-sizing humanity, making us smaller bodied through purposeful
engineering as a willfully designed adaptation in response to resource depletions, population increase, etc.
The Incredible Shrinking Man
Back to the shrinking brain; this is a natural adaptation/development.
There's no indication of any outside interference.
There are, of course studies like Bio-SETI
that are looking for clues, or
actual messages in our DNA that would indicate artifice, but, nothing as yet has given even a ghost of a blip.
We got here on our own. We've had a tough time of it and have certainly almost been the very cause of our own extinction at least during the 20th
Century, but, we're here none the less with evidently no help from anyone else.
It'd certain be fun were any of the mythologies literal tellings of actual super beings avaunting about up to whatever petty mischiefs and
machinations they've been depicted as getting up to, but, at best, such tales are of the exaggerated deeds of mortals or simply pure fantasy dreamed
up as explanation for why some things are the way they are.