Tzvetan Todorov shares his joy when the Berlin Wall fell but says democracy is threatened by ‘ultra-liberalism’ - when the political will becomes subservient to the economic powers.

Empire can be seen from the last Sunday of every month at 2000GMT, and is re-aired during the following week at these times GMT: Monday: 1200GMT; Tuesday: 0100GMT; Wednesday: 0600GMT.

Click here for more Empire.