I saw this video and Gene Roddenberry came to mind. Instead of a great depression, maybe we can achieve a different, new kind of society if humans can resist the urge to starve poor people.
So, in the end, could our present Earth ever be like Star Trek earth? Yep, but we need:
a) relatively unlimited manufacturing capacity (e.g., with replicators).
b) relatively low population on Earth, and a land-distribution system.
c) an effective world democracy, working on a federated level, with varieties of local democracy.
d) slowly, a more intelligent populace at large, which would naturally tend to reach for [...]