Maybe my question is a bit more philosophical than scientific. In the macroscopic world entropy means that things become more chaotic and less orderly as they decay. It seems to me somewhat paradoxical that in the quantum world lower generation particles "decay" into the first generation particles that form matter. I realize of course that the elementary particles that are the final result are at a lower energy level than the original generations. But even the terminology of "later" generations decaying into "first" generations seems to suggest that there are two opposite types of world in existence. In the macroscopic world, order decays into chaos and in the quantum world, chaos decays into order. Does anyone have any ideas on this?