It's kinda sad that we ended up in this political division. It's also sad that increasing hate and and anxiety (and missing education and reasoning) fuels this dumpfire of societal development. That doesn't really increase hope in the future, as stuff like climate change further accelerates this...
It's both, and not a contradiction? But I'd say the USA is indeed more progressed with this. Like both sides. They got really intelligent people but a lot of dumb people. Compared to other western societies, more, the toll of slowly erroding education and the split between poor and rich is progressing harder. Same with things like obesity which as we know of research is bad for brain development (rather the food that leads to this).
Yes I think intelligence is a spectrum and that neither side is more "correct" than the other.
I think there's good and bad ideas from both sides depending on your perspective, and we have to concede that nobody has all the answers, and that we don't know what we don't know.
Probably... For me it's more about the things that should be obvious, like burning fossil-fuels will extremely likely lead us in a worse state. But it seems that a big percentage of the western population doesn't want to believe facts and logical reasoning anymore and I think this is a very dangerous thing, as we have seen in 1920-1945.