80: The sin of the Mindless. See S. D., II, 195, 201.  This sin has to do with the period of the Separation of the Sexes in the early third rootrace, the Lemurian.  The same historical fact is hinted at also in the Bible in Genesis VI, 2:4.
"They (the sexes) had already separated before the ray of divine reason had enlightened the dark region of their hitherto slumbering minds, and had sinned. That is to say, they had committed evil unconsciously by producing an effect which was unnatural."
See also S. D., II, 721, 728.