A world in which marriage is temporary rather than permanent, in which family arrangements are diverse and colorful, in which homosexuals may be acceptable parents and retirees start raising children – such a world is vastly different from our own. Today all boys and girls are expected to find life-long partners. In tomorrow's world, being single will be no crime. Nor will couples be forced to remain imprisoned, as so many still are today, in marriages that have turned rancid. Divorce will be easy to arrange, so long as responsible provision is made for children. In fact, the very introduction of professional parenthood could touch off a great liberating wave of divorces by making it easier for adults to discharge their parental responsibilities without necessarily remaining in the cage of a hateful marriage. With this powerful external pressure removed, those who stay together would be those who wish to stay together, those for whom marriage is actively fulfilling – those, in short, who are in love.

We are also likely to see, under this looser, more variegated family system, many more marriages involving partners of unequal age. Increasingly, older men will marry young girls or vice versa. What will count will not be chronological age, but complementary values and interests and, above all, the level of personal development. To put it another way, partners will be interested not in age, but in stage.

Children in this super-industrial society will grow up with an ever enlarging circle of what might be called "semi-siblings" – a whole clan of boys and girls brought into the world by their successive sets of parents. What becomes of such "aggregate" families will be fascinating to observe. Semi-sibs may turn out to be like cousins, today. They may help one another professionally or in time of need. But they will also present the society with novel problems. Should semi-sibs marry, for example?

Surely, the whole relationship of the child to the family will be dramatically altered. Except perhaps in communal groupings, the family will lose what little remains of its power to transmit values to the younger generation. This will further accelerate the pace of change and intensify the problems that go with it.

Looming over all such changes, however, and even dwarfing them in significance is something far more subtle. Seldom discussed, there is a hidden rhythm in human affairs that until now has served as one of the key stabilizing forces in society: the family cycle.

We begin as children; we mature; we leave the parental nest; we give birth to children who, in turn, grow up, leave and begin the process all over again. This cycle has been operating so long, so automatically, and with such implacable regularity, that men have taken it for granted. It is part of the human landscape. Long before they reach puberty, children learn the part they are expected to play in keeping this great cycle turning. This predictable succession of family events has provided all men, of whatever tribe or society, with a sense of continuity, a place in the temporal scheme of things. The family cycle has been one of the sanity-preserving constants in human existence.

Today this cycle is accelerating. We grow up sooner, leave home sooner, marry sooner, have children sooner. We space them more closely together and complete the period of parenthood more quickly. In the words of Dr. Bernice Neugarten, a University of Chicago specialist on family development, "The trend is toward a more rapid rhythm of events through most of the family cycle."

But if industrialism, with its faster pace of life, has accelerated the family cycle, superindustrialism now threatens to smash it altogether. With the fantasies that the birth scientists are hammering into reality, with the colorful familial experimentation that innovative minorities will perform, with the likely development of such institutions as professional parenthood, with the increasing movement toward temporary and serial marriage, we shall not merely run the cycle more rapidly; we shall introduce irregularity, suspense, unpredictability – in a word, novelty – into what was once as regular and certain as the seasons.

When a "mother" can compress the process of birth into a brief visit to an embryo emporium, when by transferring embryos from womb to womb we can destroy even the ancient certainty that childbearing took nine months, children will grow up into a world in which the family cycle, once so smooth a d sure, will be jerkily arhythmic. Another crucial stabilizer will have been removed from the wreckage of the old order, another pillar of sanity broken.

There is, of course, nothing inevitable about the developments traced in the preceding pages. We have it in our power to shape change. We may choose one future over another. We cannot, however, maintain the past. In our family forms, as in our economics, science, technology and social relationships, we shall be forced to deal with the new.

The Super-industrial Revolution will liberate men from many of the barbarisms that grew out of the restrictive, relatively choiceless family patterns of the past and present. It will offer to each a degree of freedom hitherto unknown. But it will exact a steep price for that freedom.

As we hurtle into tomorrow, millions of ordinary men and women will face emotionpacked options so unfamiliar, so untested, that past experience will offer little clue to wisdom. In their family ties, as in all other aspects of their lives, they will be compelled to cope not merely with transience, but with the added problem of novelty as well.

Thus, in matters both large and small, in the most public of conflicts and the most private of conditions, the balance between routine and non-routine, predictable and nonpredictable, the known and the unknown, will be altered. The novelty ratio will rise.

In such an environment, fast-changing and unfamiliar, we shall be forced, as we wend our way through life, to make our personal choices from a diverse array of options. And it is to the third central characteristic of tomorrow, diversity, that we must now turn. For it is the final convergence of these three factors – transience, novelty and diversity – that sets the stage for the historic crisis of adaptation that is the subject of this book: future shock.