Maia lifted her gaze to watch low clouds briefly occult a brightly speckled, placid sea, its green shoals… — David Brin

Anyone who loves nature, as I do, cries out at the havoc being spread by humans, all over the globe. The pressures of city life can be appalling, as are the moral ambiguities that plague us, both at home and via yammering media. The temptation to seek uncomplicated certainty sends some rushing off to ashrams and crystal therapy, while many dive into the shelter of fundamentalism, and other folk yearn for better, “simpler” times. Certain popular writers urgently prescribe returning to ancient, nobler ways.

Ancient, nobler ways. It is a lovely image . . . and pretty much a lie. John Perlin, in his book A Forest Journey, tells how each prior culture, from tribal to pastoral to urban, wreaked calamities upon its own people and environment. I have been to Easter Island and seen the desert its native peoples wrought there. The greater harm we do today is due to our vast power and numbers, not something intrinsically vile about modern humankind.

Technology produces more food and comfort and lets fewer babies die. “Returning to older ways” would restore some balance all right, but entail a holocaust of untold proportion, followed by resumption of a kind of grinding misery never experienced by those who now wistfully toss off medieval fantasies and neolithic romances. A way of life that was nasty, brutish, and nearly always catastrophic for women.

That is not to say the pastoral image doesn’t offer hope. By extolling nature and a lifestyle closer to the Earth, some writers may be helping to create the very sort of wisdom they imagine to have existed in the past. Someday, truly idyllic pastoral cultures may be deliberately designed with the goal of providing placid and just happiness for all, while retaining enough technology to keep existence decent.

But to get there the path lies forward, not by diving into a dark, dank, miserable past. There is but one path to the gracious, ecologically sound, serene pastoralism sought by so many. That route passes, ironically, through successful consummation of this, our first and last chance, our scientific age.

As in elections, the law pretended universal rights, while securing the interests of powerful houses.

One great mystery is why sexual reproduction became dominant for higher life-forms. Optimization theory says it should be otherwise.

Take a fish or lizard, ideally suited to her environment, with just the right internal chemistry, agility, camouflage—whatever it takes to be healthy, fecund, and successful in her world. Despite all this, she cannot pass on her perfect characteristics. After sex, her offspring will be jumbles, getting only half of their program from her and half their re-sorted genes somewhere else.

Sex inevitably ruins perfection. Parthenogenesis would seem to work better—at least theoretically. In simple, static environments, well-adapted lizards who produce duplicate daughters are known to have advantages over those using sex.

Yet, few complex animals are known to perform self-cloning. And those species exist in ancient, stable deserts, always in close company with a related sexual species.

Sex has flourished because environments are seldom static. Climate, competition, parasites—all make for shifting conditions. What was ideal in one generation may be fatal the next. With variability, your offspring get a fighting chance. Even in desperate times, one or more of them may have what it takes to meet new challenges and thrive.

Each style has its advantages, then. Cloning offers stability and preservation of excellence. Sex gives adaptability to changing times. In nature it is usually one or the other. Only lowly creatures such as aphids have the option of switching back and forth.