The temperature range over the past 485 million years is between 46 and 97 degrees F with the vast majority over 52 degrees F. Per the chart below, the earth has spent 87 percent of its last half a billion years at or above 64 degrees F. That means our current 59 degree temperature is actually unusually cold on a large time scale.

So just to give you an idea of where we currently sit on that history:

No doubt we're warming at probably a faster rate than ever before which is a problem, but the earth has been much, MUCH hotter for a significant percentage of the time that multi-cellular life has existed on this planet.