Really drastic times always have both positive and negative aspects. History is filled with major events that altered the path humans were on, and brought about new developments. The Black Plague. The Renaissance. Evolution itself, for that matter. We’re all happy homo sapiens now, but I’ll bet the Neanderthals weren’t too joyful when that branch of the family tree was sawed off.
Segarini: Don't Believe a Word I Say 