The intellectual history of the language of class conflict is so broad a topic books can and have been written on it, but, in short-form, here's some of the background to those famous new old words of Bill de Blasio.
Bill de Blasio, on the stump in New York, August 20, 2013.
When I say all over the city we are living the tale of two cities, all you have to do is come right here and see that a family can be threatened by -- it could be mold, it could be vermin, it could be a door that doesn't lock -- and the City of New York through the Housing Authority can take a year or more to address it while meanwhile not far away in the city there are people living in multimillion dollar condos. If that's not a tale of two cities I don't know what is. And it's unacceptable. It's not how we should treat our citizens.
John Edwards, December 29, 2003.
Today, under George W. Bush, there are two Americas, not one: One America that does the work, another America that reaps the reward. One America that pays the taxes, another America that gets the tax breaks. One America that will do anything to leave its children a better life, another America that never has to do a thing because its children are already set for life. One America -- middle-class America -- whose needs Washington has long forgotten, another America -- narrow-interest America -- whose every wish is Washington's command. One America that is struggling to get by, another America that can buy anything it wants, even a Congress and a president ....
We cannot go on as two nations, one favored, the other forgotten. It is wrong to reward those who don't have to work at the expense of those who do. If we want America to be a growing, thriving democracy, with the greatest work ethic and the strongest middle class on earth, we must choose a different path.
Mario Cuomo, Democratic National Convention Keynote, July 16, 1984.
... the hard truth is that not everyone is sharing in this city's splendor and glory. A shining city is perhaps all the President sees from the portico of the White House and the veranda of his ranch, where everyone seems to be doing well. But there's another city; there's another part to the shining city; the part where some people can't pay their mortgages, and most young people can't afford one; where students can't afford the education they need, and middle-class parents watch the dreams they hold for their children evaporate.
In this part of the city there are more poor than ever, more families in trouble, more and more people who need help but can't find it. Even worse: There are elderly people who tremble in the basements of the houses there. And there are people who sleep in the city streets, in the gutter, where the glitter doesn't show. There are ghettos where thousands of young people, without a job or an education, give their lives away to drug dealers every day. There is despair, Mr. President, in the faces that you don't see, in the places that you don't visit in your shining city.
In fact, Mr. President, this is a nation -- Mr. President you ought to know that this nation is more a "Tale of Two Cities" than it is just a "Shining City on a Hill."
William Jennings Bryan, "Cross of Gold" speech, 1896.
... My friends, the question we are to decide is: Upon which side will the Democratic party fight; upon the side of "the idle holders of idle capital" or upon the side of "the struggling masses"? That is the question which the party must answer first, and then it must be answered by each individual hereafter. The sympathies of the Democratic party, as shown by the platform, are on the side of the struggling masses who have ever been the foundation of the Democratic party.
There are two ideas of government. There are those who believe that if you will only legislate to make the well-to-do prosperous, their prosperity will leak through on those below. The Democratic idea, however, has been that if you legislate to make the masses prosperous, their prosperity will find its way up through every class which rests upon them.
Come to think of it, Bryan's description of what we today call trickle-down economics was pretty well-restated by Bloomberg, who told New York magazine, "The way to help those who are less fortunate is, number one, to attract more very fortunate people. They are the ones that pay the bills."