Essentially the novel imagines a socialist and humanist world where religion has been either suppressed or ignored. People have no history or hope so they often turn to euthanasia, which is legal. Further there is a "one-world" government that uses Esperanto for its language and ultimately becomes a servant of the anti-Christ. In brief: The Catholic church has been suppressed by the rest of the world, which has turned to a form of "self religion". The Pope has made an agreement with the Italian government: the Catholic church can have all of Rome, while all other churches in Italy are surrendered to the government. Ireland still remains staunchly Catholic, with small enclaves all over the world. Westminster Cathedral is the only church in London that is still Catholic. The rest have become Freemasonic temples. The plot then follows the tale of a priest who becomes pope, and a man (who is identical in looks to the priest) who becomes "Lord of the World".Lord of the World complete text from Project Gutenberg.