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  • $\begingroup$ Atoms and molecules don't "feel" anything. They lack volition. So instead of "why do they feel the need to revert " I would ask "why do they revert" ..... $\endgroup$
    – Buck Thorn
    Commented Jun 6 at 10:15
  • $\begingroup$ Well, balls tend to roll down the hill, but if you keep hitting one with another, they can go back. For some reason you don't account for thermal energy in your picture. It's like your potential energy surface was some black hole instead of gentle hills. $\endgroup$
    – Mithoron
    Commented Jun 6 at 12:18