Jacob Ward

“Let's imagine we're standing together on the launch pad at NASA's Cape Canaveral facility near Orlando, and staring up at the stars together. As I write this, the last constellation above the horizon is Centaurus. The centaur's front head is a bright star. In fact, it's three stars—a pair called Alpha Centauri A and B, and, dimmest of the trio, Proxima Centauri. Here, look through this telescope. See? You can tell them apart. But what we can't see is that there is, in fact, a planet circling the faint light of Proxima Centauri. Man, I wish we could see it. Because that planet, Proxima Centauri b, is the nearest known exoplanet to Earth.
[...]
If we were to board a spacecraft and ride it from the outer edge of our atmosphere all the way to Proxima Centauri b, you and I, who boarded the ship fit and trim, chosen as we were from billions of applicants, would die before the voyage reached even 1/100th of the intervening distance. [...] At a speed of 20,000 miles per hour—the speed of our top-performing modern rockets—4.2 light years translates to more than 130,000 years of space travel.
[...] So how will we ever get there? A generation ship. [...] the general notion is this: get enough human beings onto a ship, with adequate genetic diversity among us, that we and our fellow passengers cohabitate as a village, reproducing and raising families who go on to mourn you and me and raise new of their own, until, thousands of years after our ship leaves Earth's gravity, the distant descendants of the crew that left Earth finally break through the atmosphere of our new home.
[...] A generation ship is every sociological and psychological challenge of modern life squashed into a microcosmic tube of survival and amplified—generation after generation.
[...] The idea of a generation ship felt like a pointless fantasy when I first encountered it. But as I've spent the last few years speaking with technologists, academics, and policy makers about the hidden dangers of building systems that could reprogram our behavior now and for generations to come, I realized that the generation ship is real. We're on board it right now.
On this planet, our own generation ship, we were once passengers. But now, without any training, we're at the helm. We have built lives for ourselves on this planet that extend far beyond our natural place in this world. And now we are on the verge of reprogramming not only the planet, but one another, for efficiency and profit. We are turning systems loose on the decks of the ship that will fundamentally reshape the behavior of everyone on board, such that they will pass those behaviors on to their progeny, and they might not even realize what they've done. This pattern will repeat itself, and play out over generations in a behavioral and technological cycle.”
― Jacob Ward, The Loop: How Technology Is Creating a World Without Choices and How to Fight Back