From the last pages of Dune and right after Hasimir Fenring restrains himself from killing the emperor for having cuffed Fenring viciously across the jaw:

Paul cleared his throat, said: "We were speaking of the throne, Majesty."

The Emperor whirled, glared at Paul. "I sit on the throne!" he barked.

"You shall have a throne on Salusa Secundus," Paul said.

So he already decided that he was the new emperor, then:

That woman over there will be my wife and you but a concubine because this is a political thing and we must weld peace out of this moment, enlist the Great Houses of the Landsraad. We must obey the forms.

Is he kidding? He has all the power, Emperor, Landsraad, Guild, BG all lined up to do his bidding and he is claiming a political thing.

Why didn't Paul marry Chani?

This came out of a suggestion that the Guild tries to prevent interstellar warfare. If so, then there would be no question welding peace, no Guild = no war.

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    Marrying Irulan gave him the legal pretext to take over the Emperor's CHOAM holdings. Doing so without that figleaf could have led to the great houses resisting his actions, up to and including nuking his planets, something they appear to be able to do with or without Guild assistance.
    – Valorum
    Dec 28, 2015 at 1:36

1 Answer 1


Political reasons

Irulan is the sole * heir of ruling House Corrino and prior to the events of "Dune" Leto Atreides was gaining popularity with Landsraad (something like a council of the noble families), which seems to be divided in support of those two families. By marrying Irulan he gained two significant advantages:

  • He legally took over from the ruling Padishah Emperor as his son-in-law
  • He united (to a degree) the Landsraad preventing a war.

Of course his true love was Chani, but from political point of view she was nobody, but as Lady Jessica said (who also never married Leto, allowing him to potentially have a political marriage):

"Think on it, Chani: that princess will have the name, yet she'll live as less than a concubine — never to know a moment of tenderness from the man to whom she's bound. While we, Chani, we who carry the name of concubine — history will call us wives."

Paul never had any children with Irulan, but she was treating his and Chani children as her own.

Later on similar political marriage you will see in the "Children of Dune" where

Leto II will marry his sister Ghanima, but will never have children with her (instead she will have official consort, who will father her children).

Of course, as the OP mentions, Paul HAS the power to force his will on the Landsraad and marry whomever he'd want, but it would lead to prolonged war with those that would see him as an usurper. Such political marriages against the will of heart were quite common in human history. NOTE

@Richard's comment is actually an answer, I'll just extended it a bit.

* While Irulan is not the only heir to the throne (as pointed by @Wrzlprmft) she is ONE of heirs (and please remember that ruling families wouldn't want to have too many children trained to become a heir to avoid the possible civil war) and by marrying her Paul has full legal right to take over from her father when he'd resign. And Muad'Dib can be very persuasive with all his army outside of the palace...

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    Irulan is the sole heir of ruling House Corrino – I do not think this is correct. We do not know how exactly heritage is determined in this universe, but we learn in Dune that she has several sisters and in Children of Dune one of them actually appears.
    – Wrzlprmft
    Dec 28, 2015 at 7:51

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