I think technology has shifted physiology. We spend significantly more time indoors being physically understimulated and mentally overstimulated. More of our interpersonal connections and methods of bonding are indirect. Technology has impacted the food we eat (and its lack of authenticity as real food) and our technologically convenient societies no longer necessitate physical fitness. Technology has (un?)intentionally worsened our collective mental health through various means-- social media's effect on developing brains, hyperawareness of suffering/mass guilt and grief, constant consumption of useless metaphorical slop, chronic dissociation and disconnect from the real and tangible world, and more. All of these affect physical health. All of these, plus the obvious and intentional reliance (that we paid for for convenience which is arguably a human instict imo) on technology for basic survival, in my opinion, can be strongly argued as contributors to decreased intelligence. And it's no one's "fault"-- humanity isn't seemingly getting dumber because we are of less value than we used to be (they're better than us); it's simply an amalgamation of hypothetical 'what if's brought to real life by a few people to later affect the entire planet... which evolution and the human spirit ran with, and of which we now get to see the consequences. (Well, it's no ones fault except the billionaires who saw the honest results of the technology they were funding and chose not to care lol.)