I think there are way too many places for me to know for sure [where this story came from], but I did grow up in the fifties and sixties, when the fear of The Bomb, was at its height. I also grew up on numerous science fiction and monster stories about creatures created by radiation and so on.

“The idea came to me like a bolt of lightning. I’d been researching technological singularity, and started to wonder, what would happen to us, if we all uploaded at the same time? Would the density of our consciousness create a gravitational singularity, and if so, would we be hastening our own end, rather than avoiding it?”

In “Travelers,” Robert Silverberg has created a future where travel between planets is the entirety of many people’s lives, people no more rooted in place than a zephyr or tornado. Without restrictions like health issues, life span or economics, the humans in this future can enjoy jaunting across galaxies the way twenty-first century oil barons enjoy island-hopping in the Caribbean. It can be a hedonistic lifestyle—or it can be a way to expand one’s horizons, ever-deepening one’s understanding of humanity through exposure to The Other: other people, other cultures, other worlds.

“I think empathy is crucial to being human and one of the skills that we don’t teach, but should. I am always, sadly, amazed at our ability to rationalize treating other living beings with discourtesy and our willingness to accept things like the deceptively named term “collateral damage” in warfare.”