In my view, none of our knowledge, including science, just “tells it like it is.” Knowledge, even the best scientific knowledge, interprets experience through human cultural understanding and experience, and above all (just as it is for poets and preachers) metaphor is the key to the whole enterprise. As I developed my own career path, as a historian and philosopher of evolutionary biology, this insight grew and grew. Everything was metaphorical — struggle for existence, natural selection, division of labor, genetic code, arms races and more. … Because metaphor helps you move forward. It is heuristic, forcing you to ask new questions. If your love is like a rose, what color is the rose? But note that it does so at a cost. A metaphor puts blinkers on us. Some questions are unanswerable within the context of the metaphor. “My love is a rose” tells me about her beauty. It does not tell me about her mathematical abilities. ¶ Now combine this fact with history. Since the scientific revolution, one metaphor above all — the root metaphor — has dictated the nature and progress of science. This is the metaphor of the world as a machine, the mechanical metaphor. What questions are ruled out by this metaphor? One is about ultimate origins. Of course you can ask about the origins of the metal and plastics in your automobile, but ultimately the questions must end and you must take the materials as given. So with the world. I think the machine metaphor rules out an answer to what Martin Heidegger called the “fundamental question of metaphysics”: Why is there something rather than nothing? Unlike Wittgenstein, I think it is a genuine question, but not one answerable by modern science.

Coming now to my own field of evolutionary biology, I see some questions that it simply doesn’t ask but that can be asked and answered by other areas of science. I think here about the natural origins of the universe and the Big Bang theory. I see some questions that it doesn’t ask and that neither it nor any other science can answer. One such question is why there is something rather than nothing, or if you like why ultimately there are material substances from which organisms are formed.