A Tale of Two Cities: Title Meaning

In the novel A Tale of Two Cities, the author Charles Dickens uses two specific cities (Paris and London) as a comparative. He tries to demonstrate the daily life living in England, while comparing it to the times that were occurring in France during the French Revolution. He didn't state it outwardly because it could've caused a riot about a possible revolution in England. He is a blunt man who titles his novels about the central character or point of his stories, so it was natural for him to point out "two cities" since he was unable to bluntly state the central point of his story without getting in trouble.