Even 150 years is _enough_ time for us to bootstrap to the next technology level. Which would be something like having robots mine the asteroid belt for manufa

Even 150 years is _enough_ time for us to bootstrap to the next technology level. Which would be something like having robots mine the asteroid belt for manufacturing resources, and getting a massive solar farm up somewhere in orbit over earth and sending the power down. Many different science fiction works have covered variations on this plan.