Dear Elon Musk: Your Dazzling Mars Plan Overlooks Some Big Nontechnical Hurdles
"These nontechnical hurdles come down to whether society writ large grants SpaceX and Elon Musk the freedom to boldly go where no one has gone before. It's tempting to think of planetary entrepreneurialism as simply getting the technology right and finding a way to pay for it. But if enough people feel SpaceX is threatening what they value (such as the environment - here or there), or disadvantaging them in some way (for example, by allowing rich people to move to another planet and abandoning the rest of us here), they'll make life difficult for the company..."
Many will be ...