"...the increasing difficulty of understanding what the warfare is really about has produced new submersive and demoralising activities of rumour-spreading, propaganda and the like, that complicate and lose contact at last with any rational objective … The uprooting of millions of people who are driven into exile among strangers, who are forced to seek new homes, produces a peculiar exacerbation of the mental strain. Never have there been such crowds of migrating dep-ressing people. They talk languages we do not understand … they stimulate xenophobia without intention … Their necessary discordance with the new populations they invade releases and intensifies the natural distrust and hostility of man for man – which it is the aim of all moral and social training to eliminate … For the restoration and modernisation of human civilisation, this exaggerated outlawing of the fellow citizen who we see fit to suspect as a traitor or revolutionary and also of the stranger within our gates, has to be restrained and brought back within the scheme of human rights."
- HG Wells, The Rights Of Man, 1940
(and just because I like the picture)
The Martians were an allegory of Imperialism.
The Morlocks were an allegory of the consequences of having an underclass.