I just watched a program on the International History Channel describing a Saxon sea port of around 1000 AD. The archeologists are now able to examine this area because the sea level, at least at this part of England, is about 6 - 10 feet lower than it was in the days when the Saxons were able to sail into the port. I wonder where the water went. There is no river at this place to have silted up the harbor. Could it be we are still locked in the final stages of an ice age and the Earth is just returning to normal conditions?
This sea would contain the melt-off from most of the Greenland glaciers and turn an environment viturally void of life into a vibrant source of sea life and shoreline villages which would support fishing and agriculture.
The main downside is that it wouldn't give the global warming alarmists control of first world economies-- which is their real objective.
Though I often say words that are nearly verbatim what you have posted, it's really more true that "normal" is not a steady state. Climate is ever-changing, IMHO.