1970s: In 1970, of the 25.4 million Americans who live in poverty, 7.5 million, or 33.5 percent, are African American. The average income cutoff level for a family of four at the poverty level is $3,968.

1990s: In 1995, 36.4 million Americans, including 27.5 million families, live in poverty. Almost 10 million individuals, or 29.3 percent of the population, are African American. At the beginning of the decade, 44 percent of poor children are African American, while 15 percent are white. The average income cutoff level for a family of four at the poverty level is $15,569.

1970s: In 1970, Americans in the lowest 5 percent have a mean income of $7,281, and the top 5 percent have a mean income of $119,432, in 1996 dollars.

1990s: In 1994, Americans in the lowest fifth have a mean income of $7,762. The top five percent have a mean income of $183,044.

1970s: There are 9.7 million Americans who receive some form of welfare. In New York City in...