An event that affected only a handful of people at the time of its occurrence in the past can have large-scale consequences today. The Peloponnesian War, for example, was little more than a skirmish by modern standards. While Athens, Sparta and several nearby citystates battled, the population of the rest of the globe remained largely unaware of and undisturbed by the war. The Zapotec Indians living in Mexico at the time were wholly untouched by it. The ancient Japanese felt none of its impact.

Yet the Peloponnesian War deeply altered the future course of Greek history. By changing the movement of men, the geographical distribution of genes, values, and ideas, it affected later events in Rome, and, through Rome, all Europe. Today's Europeans are to some small degree different people because that conflict occurred.

In turn, in the tightly wired world of today, these Europeans influence Mexicans and Japanese alike. Whatever trace of impact the Peloponnesian War left on the genetic structure, the ideas, and the values of today's Europeans is now exported by them to all parts of the world. Thus today's Mexicans and Japanese feel the distant, twice-removed impact of that war even though their ancestors, alive during its occurrence, did not. In this way, the events of the past, skipping as it were over generations and centuries, rise up to haunt and change us today.

When we think not merely of the Peloponnesian War but of the building of the Great Wall of China, the Black Plague, the battle of the Bantu against the Hamites – indeed, of all the events of the past – the cumulative implications of the time-skip principle take on weight. Whatever happened to some men in the past affects virtually all men today. This was not always true. In short, all history is catching up with us, and this very difference, paradoxically, underscores our break with the past. Thus the scope of change is fundamentally altered. Across space and through time, change has a power and reach in this, the 800th lifetime, that it never did before.

But the final, qualitative difference between this and all previous lifetimes is the one most easily overlooked. For we have not merely extended the scope and scale of change, we have radically altered its pace. We have in our time released a totally new social force – a stream of change so accelerated that it influences our sense of time, revolutionizes the tempo of daily life, and affects the very way we "feel" the world around us. We no longer "feel" life as men did in the past. And this is the ultimate difference, the distinction that separates the truly contemporary man from all others. For this acceleration lies behind the impermanence – the transience – that penetrates and tinctures our consciousness, radically affecting the way we relate to other people, to things, to the entire universe of ideas, art and values.

To understand what is happening to us as we move into the age of super-industrialism, we must analyze the processes of acceleration and confront the concept of transience. If acceleration is a new social force, transience is its psychological counterpart, and without an understanding of the role it plays in contemporary human behavior, all our theories of personality, all our psychology, must remain pre-modern. Psychology without the concept of transience cannot take account of precisely those phenomena that are peculiarly contemporary.

By changing our relationship to the resources that surround us, by violently expanding the scope of change, and, most crucially, by accelerating its pace, we have broken irretrievably with the past. We have cut ourselves off from the old ways of thinking, of feeling, of adapting. We have set the stage for a completely new society and we are now racing toward it. This is the crux of the 800th lifetime. And it is this that calls into question man's capacity for adaptation – how will he fare in this new society? Can he adapt to its imperatives? And if not, can he alter these imperatives?

Before even attempting to answer such questions, we must focus on the twin forces of acceleration and transience. We must learn how they alter the texture of existence, hammering our lives and psyches into new and unfamiliar shapes. We must understand how – and why – they confront us, for the first time, with the explosive potential of future shock.

Early in March, 1967, in eastern Canada, an eleven-year-old child died of old age.

Ricky Gallant was only eleven years old chronologically, but he suffered from an odd disease called progeria – advanced aging – and he exhibited many of the characteristics of a ninety-year-old person. The symptoms of progeria are senility, hardened arteries, baldness, slack, and wrinkled skin. In effect, Ricky was an old man when he died, a long lifetime of biological change having been packed into his eleven short years.

Cases of progeria are extremely rare. Yet in a metaphorical sense the high technology societies all suffer from this peculiar ailment. They are not growing old or senile. But they are experiencing super-normal rates of change.

Many of us have a vague "feeling" that things are moving faster. Doctors and executives alike complain that they cannot keep up with the latest developments in their fields. Hardly a meeting or conference takes place today without some ritualistic oratory about "the challenge of change." Among many there is an uneasy mood – a suspicion that change is out of control.

Not everyone, however, shares this anxiety. Millions sleepwalk their way through their lives as if nothing had changed since the 1930's, and as if nothing ever will. Living in what iscertainly one of the most exciting periods in human history, they attempt to withdraw from it, to block it out, as if it were possible to make it go away by ignoring it. They seek a "separate peace," a diplomatic immunity from change.

One sees them everywhere: Old people, resigned to living out their years, attempting to avoid, at any cost, the intrusions of the new. Already-old people of thirty-five and forty-five, nervous about student riots, sex, LSD, or miniskirts, feverishly attempting to persuade themselves that, after all, youth was always rebellious, and that what is happening today is no different from the past. Even among the young we find an incomprehension of change: students so ignorant of the past that they see nothing unusal about the present.

The disturbing fact is that the vast majority of people, including educated and otherwise sophisticated people, find the idea of change so threatening that they attempt to deny its existence. Even many people who understand intellectually that change is accelerating, have not internalized that knowledge, do not take this critical social fact into account in planning their own personal lives.

How do we know that change is accelerating? There is, after all, no absolute way to measure change. In the awesome complexity of the universe, even within any given society, a virtually infinite number of streams of change occur simultaneously. All "things" – from the tiniest virus to the greatest galaxy – are, in reality, not things at all, but processes. There is no static point, no nirvana-like un-change, against which to measure change. Change is, therefore, necessarily relative.

It is also uneven. If all processes occurred at the same speed, or even if they accelerated or decelerated in unison, it would be impossible to observe change. The future, however, invades the present at differing speeds. Thus it becomes possible to compare the speed of different processes as they unfold. We know, for example, that compared with the biological evolution of the species, cultural and social evolution is extremely rapid. We know that some societies transform themselves technologically or economically more rapidly than others. We also know that different sectors within the same society exhibit different rates of change – the disparity that William Ogburn labeled "cultural lag." It is precisely the unevenness of change that makes it measurable.