One of the most destructive groups of people have been communist regimes, which have destroyed library books that do not serve the current power structure. In Soviet Russia, as Joseph Stalin "purged" individuals, all of their writing and research was also destroyed. During the Invasion of Tibet, Chinese communists forced Tibetans to destroy their own books or manuscripts by burning, shredding, mixing with manure or by walking on them. Other totalitarian governments have destroyed various library books because these governments see "reading and research as political acts" which can lead individuals to thoughts that run counter to the government.