Ars Technica had an article about Jeff Bezos’ motivations for space rocketry and travel:
Bezos dismissed this approach on Oct. 22, during the Pathfinder Awards at the Seattle Museum of Flight. In remarks first shared by GeekWire, Bezos said Earth should be zoned as a residential area. “I don’t like the Plan B idea that we want to go into space so we have a backup planet,” he said, noting NASA’s efforts to send probes throughout the solar system. “Believe me, this is the best planet. There is no doubt this is the one you want to protect. This is the jewel. We evolved here, we’re kind of made for this planet. It’s gorgeous, and we can use space to protect it.”
Humanity has two futures, Bezos said. It can continue to grow, or it can settle into some kind of population equilibrium. As an example of the planet’s limitations he offered energy as an example. Taking the baseline energy use on Earth, and compounding it at 3 percent for 500 years, would require covering the entire surface of the Earth in solar cells to meet the demand by the year 2500.
“We need to go into space if we want grow as a species,” he said. “Another route would be just to face stasis, but I don’t think that’s as interesting. I don’t think we want to just survive on this planet, I think we want to thrive and do amazing things.”