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"In the 1950's this America worried about itself, yet even its anxieties were products of abundance. . . Now the American city has been transformed. The poor still inhabit the miserable housing in the central areas, but are increasingly isolated from contact with, or sight of, anybody else. . . . [T]he poor are politically invisible. It is one of the cruelest ironies of social life in advanced countries that the dispossessed at the bottom of society are unable to speak for themselves. The people of the other America do not, by far and large, belong to unions, to fraternal organizations, or to political parties. They are without lobbies of their own; they put forward no legislative program. As a group, they are atomized. They have no face; they have no voice . . ."-Source: Michael Harrington, The Other America: Poverty in the United States, 1962The author's account in the excerpt above most directly encouraged which of the following changes in subsequent years?

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