 What is NOT a technological/social advancement involved in this story?
Rather than spoil what was clearly going to be a perfect day, he chose to ignore the fact that he had been forbidden to use time-stopping as a convenience for journeying far from home. He chose to ignore the negative maxim that "small children who stop time without an adult being present, may not live to regret it." Some distance behind them were eight more, each of whom were motionless in a curious pose of interrupted animation. For him, the world would continue to be a tableau of mannikins until he resumed time. Your new piece of real estate is going to make you so rich that you can buy your next planet. We've found low-grade ore on every planet I've discovered so far, and this one'll be no different.
 Teleportation
 Radiation impacting life forms  Time travel  Teleportation  Colonization of other planets