"Nationalism, like the ideas of Leo Tolstoi, is an attempt to stop the course of history. Everything leading to separation is the result of license: it smashes what is whole, breaks and pulverizes it into tiny fragments that can never be joined together again. The truth of this has become completely apparent in our century. We have been witness to the process of disintegration. What has it brought us, apart from material and spiritual impoverishment?"
January 1, 1970
https://en.wikiquote.org/wiki/Nadezhda_Mandelstam