A reader writes:

I think AC is an abomination because I would always freeze in the summer - in stores, in offices - which caused me to have to carry around a wool sweater in August.  Yuck.

On a more philosophical note, air-conditioning has only exacerbated a go-go, workaholic, culture. There's also an arrogant and distasteful, conspicuously wasteful "domination of nature" aspect to it, as epitomized by the indoor ski slopes in Dubai. In more "slow" locales like Italy and Spain, there's not a lot of AC, but there are siestas, and virtually everyone takes the whole of August off, fleeing the blazing asphalt and concrete of the cities. There's something to be said for allowing the environment to lead us to pause and have time for reflection, time to spend resting or reading, or eating and drinking and conversing with family and friends.

There's also something to be said for moderation and the ability to avoid heat-stroke. I can't converse with anyone in 90 degree humidity.