Global Warming, Been There, Done That

Contrary to the rantings of global warming alarmists, the Earth has been warmer - much warmer.

In the 12th and 13th centuries England exported wine to France. Vineyards also flourished in improbable regions like southern Norway and eastern Prussia. A centuries-long spell of mild, predictable weather blessed Western Europe with abundant crops, healthy populations and budget surpluses sufficient to finance projects like Chartres Cathedral.

Even if the Earth is warming, why choose to believe that everything will be worse? What evidence is there for a single ideal climate?