There is no "correct temperature". Correct for whom? Fish? Bacteria? Trees? Humans? Who cares? We are all citizens of planet earth. The temperature at any given time? It is what it is(currently increasing), and we are all along for the ride. It is estimated that over 99% of all species that have ever inhabited the earth are now extinct. They're all gone for many different reasons, but you can bet my next regional paycheck that temperature swings (up or down) played a part in many extinctions.

Did I read some of the articles? Sure I did. I noticed that Dyson was referenced in the skeptics portion. I started to read the article you cited, and stopped when he stated that he was not a climatologist, meteorologist, etc. But then I continued. His issue is with the computer models and predictions, and his assertion that we don't have conclusive proof as to whether or not human activity is accelerating, or even affecting, the warming process. He is NOT disputing the fact that the globe is warming.