DisadvantagedThe disadvantaged peoples without power, money, or other means of influence. They are similarly called "the poor", "the disenfranchized", etc.
Although in some cultures there upward mobility gives people hope to change their futures, statistically a person born into poverty is likely to die there and have children who live powerless as well.
The current economy in the United States is one that has divided the rich and the poor, with the rich taking the bulk of the gains in productivity of the last several decades. According to Paul Krugman in a recent article titled For Richer in the New York Times about the distribution of wealth, there is even more of a divide between the classes today than in the 1920s, meaning that the disadvantaged are becoming more so (and the middle class may be headed their way as well).