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.[41] In Soviet Russia, as Joseph Stalin "purged" individuals, all of their writing and research was also destroyed.[42] 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.[43] 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.[44]