notice how it goes; the first generation ends with PR; the second generation starts with _PR_, adds _PR__2_, and ends with _PR + PR__2_; the third generation starts with _PR + PR__2_, adds _PR__3_ and ends with _PR + PR__2__ + PR__3_; and so on and on; the _gain_ made in the _T__th_ generation is _PR__T_; _the total gain_ made in _T_ generations is _PR + PR__2__ + PR__3__ + ... + PR__T_; this total gain is given by the formula, Total gain in T generations = (R ÷ R-1) (PRT-P). If we take _R_ to be 2 (which is a very small ratio, requiring the progress of each generation to be merely double that of the preceding one) and if we take _T_ to be (say) 10, then we see that the progress made by the single 10th generation is _P_ × 210, which is 1024 times the progress made in the “first” generation; and we readily compute that the total gain in 10 generations is 2046 times the progress made in the “first” generation. Moreover, to gain a just sense of the impressiveness of this law, the reader must reflect upon the fact that it operates, not merely on one field, but in all fields of human interest. “Operates in all fields” I have just now said; as a matter of fact, as before pointed out, it does not so operate _now_ in _all_ fields nor has it ever done so. My point is that it _will_ so operate when we once acquire sense enough to let it do so. That sense we shall have when and only when we discover that by nature we are time-binders and that the _effectiveness_ of our time-binding capacity is not only a function of time but is, as I have explained, a logarithmic or exponential function of time—a function in which time (_T_) enters as an _exponent_, as in the expression _PR__T_, so that we humans are, unlike animals, naturally qualified not only to progress, but to progress more and more rapidly, with an always _accelerating acceleration_, as the generations pass. This great fact is to be at once the basis, the regulator and guide in the science and art of Human Engineering. Whatever squares with that law of time-binding human energy, is right and makes for human weal; whatever contravenes it, is wrong and makes for human woe. And so I repeat that the world will have uninterrupted, peaceful progress when and only when the so-called social “sciences”—the life-regulating “sciences” of ethics, law, philosophy, economics, religion, politics, and government—are technologized; when and only when they are made genuinely scientific in spirit and method; for then and only then will they advance, like the natural, mathematical and technological sciences, in conformity to the fundamental exponential law of the time-binding nature of man; then and then only, by the equal pace of progress in all cardinal matters, the equilibrium of social institutions will remain stable and social cataclysms cease. Chapter V. Wealth