Here are some quotes:
The totalitarian system, I learned, endures not simply by getting rid of democratic elections and imposing a one-party state. It endures by abolishing the distinction between civil society and the state, and by allowing nothing significant to occur which is not controlled by the Party.
...
In the underground universities of communist Europe, my friends and colleagues studied those things, and prepared themselves for the hoped-for day when the Communist Party, having starved itself of every rational input, would finally give up the ghost. And the lessons that they learned need to be learned again today, as our politicians lead us forth under the banner of democracy, without pausing to examine what democracy actually requires.