Probably the most common factor in biological, aerospace, civil engineering and other disasters is scientific hubris--a cocky overestimation of scientific understanding and one's own intellectual capacity and a fatal underestimation of the complexity of factors of our world--including our own bodies.
A scientific journal recently proclaimed that "Researchers have demonstrated they can efficiently IMPROVE the DNA of human embryos." This kind of propaganda that emanates from the scientific community serves to advance their own financial and intellectual interests.
Mix hubris, greed and propaganda and you have a prescription for human suffering and loss of life. A quick Google turns up instructive disaster examples in Aerospace (e.g., Columbia Shuttle, Concorde, TWA Flight 800), civil engineering (e.g., World Trade Center Collapse, Quebec Bridge) and other areas of science (e.g., Titanic, Nuclear Fuel Rod, Bhopal, Flixborough).
But with this particular scientific disaster-in-the-making (the phrase "improving the DNA of human embryos" says it all), we're talking about a new and abominable kind of disaster that will potentially span generations.
These particular researchers have already shown that they are not concerned about the sanctity of human life, by destroying human embryos as if they were guinea pigs.
It's time we stop thinking of scientists and researchers as somehow, unlike every other kind of person on earth, totally objective and trustworthy. We need to end the notion, pervasive among our modern culture that essentially worships science as an alternative religion, that somehow we need to let scientists do whatever they fancy because, well, they're so much smarter than all the rest of us combined.
We cannot--must not--let a hubristic, well-funded but ethically bankrupt elite run our society. Wake up and speak up about this.