You are never gonna evacuate the Earth with even reusable rockets. With launch loops and space elevators? Yeah, no problem, totally possible. :) For fictional

You are never gonna evacuate the Earth with even reusable rockets. With launch loops and space elevators? Yeah, no problem, totally possible. :) For fictional yet science based scenario see this Orions Arm article: https://orionsarm.com/eg-article/49b46fd2198ed https://orionsarm.com/eg-article/49b46fd2198ed The biggest problem is actually not to lift all the people out of Earth's gravity well, but where to put them afterwards...