Aristotle -- first and second potentialities and actualities.

I had a law exam yesterday and I had to discuss Aristotle.

 

There's a reason why Aristotle doesn't play a big role in modern science: his stuff is obsolete. Detailed accounts of the metaphysics of causation are about as archaic as Descartes' homoculi.

One has to admire Aristotle being so ahead of his time and he was probably the smartest human being ever, but the world is (blissfully) less complex than you'd guess from his Physics or Metaphysics.