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Did the Past Really Happen? - Vsauce
by coffeesp00ns

    ...There's your real legacy: your contribution to the universe's growing entropy. No process will be able to undo the net increase in entropy you accomplish in your life.

    History may forget you, or misinterpret your accomplishments or what you stood for, the ripples you leave behind may get redirected, but the universe will never be able to forget the entropy that you add.

    That's the law - The second law of thermodynamics.