Media playback is unsupported on your device Viewpoint: Does democracy lead to tyranny?
18 January 2017 Last updated at 22:19 GMT
The inauguration of Donald Trump as President of the US is on Friday.
What does he represent? What might his presidency bring? In the second of two very personal viewpoints for BBC Newsnight, British-American author and blogger Andrew Sullivan argues there are lessons to be learnt from Plato.
Watch the first opinion piece – from art critic and social commentator Roger Kimball – here
Animation: Aslan Livingstone-Ra. Producer: Ed Brown