H. G. Wells 
When the Sleeper Wakes 

Graham, an 1890s radical pamphleteer who is eagerly awaiting the twentieth century and all the advances it will bring, is stricken with insomnia. Finally resorting to medication, he instantly falls into a deep sleep that lasts two hundred years. Upon waking in the twenty-second century to a strange and nightmarish place, he slowly discovers he is master of the world, revered by an adoring populace who consider him their leader. Terrified, he escapes from his chamber seeking solace—only to realize that not everyone adores him, some even wish to harm him.