Did Aristotle advance Western science? I know he was a geocentrist, but I'm looking at science before him, and there isn't much of anything there. The fact that he wrote down his ideas, in and of itself, seems to be an improvement in science. The fact that he was thinking, and talking, and wondering, and trying to figure out the cosmos in an academic way seems like a great improvement in the 4th century B.C. Ptolemy, on the other hand, dropped the ball. He should have taken Aristotle's work and improved on it. Ptolemy had a lot more to work with, but he failed to improve science.