Regression (Civilization) -- Fiction. Virtual reality -- Fiction. Utopias -- Fiction. Puzzles -- Fiction.

Regression (Civilization) -- Juvenile fiction. End of the world -- Juvenile fiction.

Social history -- 1945- Social change -- History -- 20th century Generations Social sciences -- Philosophy Civilization, Modern -- 1950-

Regression (Civilization) -- Fiction Virtual reality -- Fiction Utopias -- Fiction Puzzles -- Fiction