It was the birth of so-called 'Multidimensional imperialism'. At first, they plundered other worlds just to survive, but at some point, they plundered to satisfy their greed.
"Countries and corporations have taken over an entire planet, and have obtained everything in their hands."
They secured the near-infinite supply and demand of resources, the near-perfect material abundance, and the dream-like future.
"From then on, we just found it boring to bring resources from other worlds."
In other words, they were not satisfied. They achieved material affluence, but they were spiritually poor.
Sungwoo asked, "That's why you started using the game to satisfy your needs?"
Walter said with a nod, "That's right. What we are enjoying is a reality game that can give us a basic pleasure that is completely different from virtual reality."