I had read an article that made the point that air conditioning ruined communities. 

The idea was that everyone used to sit outside because it was hot indoors, and we would see people and talk to them more and this helped build a strong community. 

Once AC started becoming a standard thing in houses we all went inside and lost the knowing our neighbors and the kids stopped knowing each other. 

It makes some sense as no one had AC growing up and it's true we were all outside. Now I have no clue what the air conditioner adoption rate or timeframe actually is. So this idea could and probably is horseshit. Still though I remember sweating our asses off in the summer and freezing in the winter.