My topic is utopianism. The idea of a perfect society is a very old dream, whether because of the ills of the present, which make men conceive of what their world would be like without them – to imagine some ideal state in which there was no misery and no greed, no danger or poverty or fear of brutalising labour or insecurity – or because these utopias are fictions deliberately constructed as satires, intended to criticise the actual world and to shame those who control existing regimes, or those who suffer them too tamely; or perhaps they are social fantasies – simple exercises of the poetical imagination.