When scientists underestimate complexity, they fall prey to the perils of unintended consequences. The parables of such scientific overreach are well-known: foreign animals, introduced to control pests, become pests in their own right; the raising of smokestacks, meant to alleviate urban pollution, releases particulate effluents higher in the air and exacerbates pollution; stimulating blood formation, meant to prevent heart attacks, thickens the blood and results in an increased risk of blood clots in the heart. But when nonscientists overestimate [italicized, sic] complexity- 'No one can possibly crack this [italicized, sic] code - they fall into the trap of unanticipated consequences. In the early 1950s , a common trope among some biologists was that the genetic code would be so context dependent- so utterly determined by a particular cell in a particular organism and so horribly convoluted- that deciphering it would be impossible. The truth turned out to be quite the opposite: just one molecule carries the code, and just one code pervades the biological world. If we know the code, we can intentionally alter it in organisms, and ultimately in humans. Similarly, in the 1960s, many doubted that gene-cloning technologies could so easily shuttle genes between species. by 1980, making a mammalian protein in a bacterial cell, or a bacterial protein in a mammalian cell, was not just feasible, it was in Berg's words, rather ridiculously simple. Species were specious. Being natural was often just a pose.

~ Siddhartha Mukherjee

No, there's a group of hardened, fossilised men opposed by fresh young revolutionaries as John Butte once was, forming between them a whole, a balance. And then a group of fossilised hardened men like John Butte, opposed by a group of fresh and lively-minded and critical people. But the core of deadness, of dry thought, could not exist without lively shoots of fresh life, to be turned so fast, in their turn, into dead sapless wood. In other words, I, 'Comrade Anna'- and the ironical tone of Comrade Butte's voice now frightens me when I remember it-keep Comrade Butte in existence, feed him, and in due course will become him. And as I think this, that there is no right, no wrong, simply a process, a wheel turning, I become frightened, because everything in me cries out against such a view of life, and I am back inside a nightmare which it seems I've been locked in for years, whenever I'm off guard. The nightmare takes various forms, comes in sleep, or in wakefulness, and can be pictured most simply like this: There is a blindfolded man standing with his back to a brick wall. He has been tortured nearly to death. Opposite him are six men with their rifles raised ready to shoot, commanded by a seventh, who has his hand raised. When he drops his hand, the shots will ring out, and the prisoner will fall dead. But suddenly there is something unexpected-yet not altogether unexpected, for the seventh has been listening all this while in case it happens. There is an outburst of shouting and fighting in the street outside. The six men look in query at their officer, the seventh. The officer stands waiting to see how the fighting outside will resolve itself. There is a shout: 'We have won!' At which the officer crosses the space to the wall, unties the bound man, and stands in his place. The man, hitherto bound, now binds the other. There is a moment, and this is the moment of horror in the nightmare, when they smile at each other: it is a brief, bitter, accepting smile. They are brothers in that smile. The smile holds a terrible truth that I want to evade. Because it cancels all creative emotion. The officer, the seventh, now stands blindfolded and waiting with his back to the wall. The former prisoner walks to the firing squad who are still standing with their weapons ready. He lifts his hand, then drops it. The shots ring out, and the body by the wall falls twitching. The six soldiers are shaken and sick; now they will go and drink to drown the memory of their murder. But the man who was bound, is now free, smiles as they stumble away, cursing and hating him, just as they would have cursed and hated the other, now dead. And in this man's smile at the six innocent soldiers there is a terrible understanding irony. This is the nightmare.

~ Doris Lessing