Elon Musk says
“I wonder how many dead one-planet civilizations are out there in the cosmos that never made it to the other planet and ultimately extinguished themselves or were destroyed by external factors. Probably a few.”
This quote is part of:
“We’re going to build a road to space so that our kids and their kids can build the future. And we need to do that. We need to do that to solve the problems here on Earth. It’s not about escaping.”