C. S. Lewis had similar thoughts on the unpredictability of “evolution” in his “Evolutionary Hymn” (read it all here):
Lead us, Evolution, lead us
Up the future’s endless stair:
Chop us, change us, prod us, weed us
For stagnation is despair:
Groping, guessing, yet progressing,
Lead us nobody knows where.
And, come to think of it, “Lead us nobody knows where” might be quite a good slogan for Obama’s presidential campaign.