CCReflect

"That paper, titled "How Useful Is the Theory of Disruptive Innovation?," does not take up a more far-reaching question: Why has a mostly untested theory persisted and proliferated for 20 years? "

""And now, weak, short of breath, my once-firm muscles melted away by cancer, I find my thoughts, increasingly, not on the supernatural or spiritual, but on what is meant by living a good and worthwhile life - achieving a sense of peace within oneself. I find my thoughts drifting to the Sabbath, the day of rest, the seventh day of the week, and perhaps the seventh day of one's life as well, when one can feel that one's work is done, and one may, in good conscience, rest.""

"For Musk, going to Mars is way more than just cool. "Are we on a path to becoming a multiplanet species or not?" he has asked. "If we're not, well, that's not a very bright future. We'll simply be hanging out on Earth until some eventual calamity claims us." Impey makes much the same point. "Humankind evolved over millions of years," he observes. "But over the last 60 years, atomic weaponry created the potential to extinguish ourselves. Sooner or later we must expand beyond this blue and green ball, or go extinct." So does Petranek. "There are real threats to the continuation of the human race on Earth, including our failure to save the home planet from ecological destruction and the possibility of nuclear war," he writes. "The first humans who emigrate to Mars are our best hope for the survival of our species.""