As far as I understand things, air conditioning was standard in cars in the USA as early as by the mid-1950s or so. Perhaps even sooner.
In the late 1990s, our car (common model of Volvo, albeit a few years old for sure) in Europe had no air conditioning at all. It was often very hot to sit in in the summer. (Just as it was very cold in the winter.)
I've endured the last 20 years worth of hot summers without air conditioning. Actually, in 2016 or something, I did have it briefly, in the form of a portable unit which was located indoors and hooked up to the window in a very problematic manner, because it was clearly not made for windows which open inward (it expected slide windows), to the point where I had to get rid of it since it kept coming loose all the time, driving me absolutely insane. (But the coldness it produced, for the short bursts when it was working as intended, was Heaven-like.)
In the USA, it seems as if even the cheapest possible place where you can live still has air conditioning as a "minimum standard of living", since what seems like decades at the least.
How come this wonderful invention is basically unheard of here, in spite of it being so unbearably hot, whereas it's extremely common in the USA?
I did notice even as a kid that the fancy houses had AC units on the outside, so it definitely did exist, but seems to have been (and remained) something of a luxury product which by no means is standard or even common in apartments.
Why is this?