Dystopian literature is a variety of fictional genre used to survey social and political compositions in 'a gloomy, horrific background.' The term dystopia is an antonym for "utopia". It is defined as a society characterized by deficiency, immorality or tyranny and the theme is generally employed in science-fiction and other tentative fictional genres.
Dystopian worlds aim at disastrous regimes and civilizations where things can only be ranged from bad to worse. Dystopian settings are rough, severe, and focus on putrefaction and failure.
Here, this idea is presented in the final line of the provided poem. The line is mentioned below:
“...for I have lived in the City of the damd, and I know what horror men permitted to be brought upon them."