African Americans see a widening gulf between the values of middle class and poor blacks, and nearly four-in ten say that because of the diversity within their community, blacks can no longer be thought of as a single race, a new Pew Research Center survey has found. The survey also finds blacks less upbeat about the state of black progress now than at any time since 1983. Looking backward, just one-in-five blacks say things are better for blacks now than they were five years ago. Looking ahead, fewer than half of all blacks (44%) say they think life for blacks will get better in the future, down from the 57% who said so in a 1986 survey.