"Political blindness and a narrow-minded vision, fanned by mercenary self-interest, had provoked the actions of the [August Coup] conspirators. The separatists and extreme radicals now possessed the most devastating argument in favour of the break-up of the Union. The leaders of the coup had dislodged the stone that started a landslide."
January 1, 1970
https://en.wikiquote.org/wiki/Mikhail_Gorbachev