changes in the world economy may be destructive in terms of the old social model, but they are profoundly liberating and benign in and of themselves. The family farm wasn’t dying because capitalism had failed or a Malthusian crisis was driving the world to starvation. The family farm died of abundance; it died of the rapidly rising productivity that meant that fewer and fewer people had to work to produce the food on which humanity depended.Mead continues:Revolutions in manufacturing and, above all, in communications and information technology create the potential for unprecedented abundance and a further liberation of humanity from meaningless and repetitive work. Our problem isn’t that the sources of prosperity have dried up in a long drought; our problem is that we don’t know how to swim. It is raining soup, and we are stuck holding a fork.The 21st century, Mead adds,must reinvent the American Dream. It must recast our economic, social, familial, educational and political systems for new challenges and new opportunities. Some hallowed practices and institutions will have to go under the bus. But in the end, the changes will make us richer, more free and more secure than we are now.Mead’s predictions may or may not prove prescient, but it his thinking, more than Murray’s, that reflects the underlying optimism that has sustained the United States for more than two centuries — a refusal to believe that anything about human nature is essentially “intractable.” Mead’s way of looking at things is not only more inviting than Murray’s, it is also more on target.