The Science of Discworld IV: Judgement Day

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The Science of Discworld IV: Judgement Day
Author Terry Pratchett
Language English
Series Discworld
4th science book
Subject

evolution theory
Scientific theories

Characters
Unseen University Staff, Marjorie Dawes, Rincewind, Havelock Vetinari
Locations
Roundworld, Discworld
Genre Fantasy
Publisher Random House
Preceded by The Science of Discworld III: Darwin's Watch

The Science of Discworld IV: Judgement Day is a book set on the Discworld, by Terry Pratchett, Ian Stewart and Jack Cohen. It is the sequel to The Science of Discworld, The Science of Discworld II: The Globe and The Science of Discworld III: Darwin's Watch.

As with the first three volumes, the book alternates between a Discworld story and a serious scientific discussion.

"The Science of Discworld series is arguably unique in style: we call it fact/fantasy fusion. The scenario allows serious discussion of solid, current science, without distorting it into ‘yes, pigs really could fly given GM wings’ or whatever. All three books entered the Sunday Times bestseller lists, and the third made it to number one, so we managed to reach a significantly large audience. Perhaps the most gratifying comment came from a Times reviewer: ‘the hard science is as gripping as the fiction’. Which is just as it should be." (Prof. Ian Stewart)[1]

The title may sound apocalyptic, but the book does not reflect this. Rather, the Discworld Story details a trial before Lord Vetinari who will pass Judgement. The scientific sections of the book mostly deal with religious beliefs, especially around the creation of the earth and its peoples.

Plot summary[edit]

In the Discworld story an attempt to perform a magical feat overseen by Ponder Stibbons results in a magical accident which sees the Roundworld librarian, Marjorie Dawes, sucked into the Discworld from her library in England. Meanwhile, the High Priests of Omnia (see Small Gods) have declared that, since Omnism has always speculated that the Discworld is, in fact, spherical and Roundworld is, clearly, a spherical world (though one that is currently in a glass container on a small shelf in the Unseen University) it proves that Omnism was always correct and use this as "evidence" that Roundworld should belong to Omnia.

The wizards of Unseen University, especially Mustrum Ridcully, The Dean (now Archchancellor of the new Brazeneck University), Ponder Stibbons and The Librarian reject this, since Roundworld was created by accident when the Dean stuck his finger in a pile of ooze some books previously. The arguments are brought before Lord Vetinari to judge, who ultimately decides in favour of the University.

Ideas and themes[edit]

In the discussion section Cohen and Stewart re-examine the theory of evolution and the changes in the idea over the years. They also explore how scientific theories happen in general, and how they differ from other ways of thinking. They also point out how many religions have created Creation stories (some remarkably similar) and God(s) and how this thinking can be quite introspective suggesting that the existence of the universe is purely for the benefit of human beings as opposed to most scientific belief that the universe would still exist even if human beings did not exist.

References[edit]