18

Before Harry's fifth year at Hogwarts, Dumbledore has trouble finding anyone for the DADA job, and so Fudge gives him Umbridge. He must've known why Fudge wanted Umbridge there, and he must've known also that it wouldn't work out too well for him. The next year, he hires Slughorn as Potions teacher and Snape as DADA, which worked out fine. Except the part where

Snape killed him at the end of the year, but he wanted that to happen.

So why couldn't he have hired Slughorn a year earlier? It would've made life much less depressing for all of us.

  • 3
    To my mind it's because Dumbledore wasn't keen to introduce Harry to Slughorn when he was too young and might still be swayed by his wiles. by the time he takes Harry to meet him, he's sufficiently worldly-wise to see through his crap almost instantly. – Valorum Aug 27 '15 at 20:02
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    It also might not have been wise to reject the Ministry's hand-picked favorite. Given that Dumbledore was already suspected of being untrustworthy, it might not have been a good idea to say, "Nah I don't want your trusted lieutenant here, I'll just give the job to this hobnobbing buffoon I know from back in the day." – Nerrolken Aug 27 '15 at 20:07
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    Correct me if I'm wrong but didn't Dumbledore try to get Slughorn to return multiple times before he finally succeeded? – Rogue Jedi Aug 27 '15 at 20:16
  • @RogueJedi Can you point to a reference? I skimmed the Slughorn passage when I wrote my answer and didn't see anything that implied this, but I may have missed it and/or forgotten. – alexwlchan Aug 28 '15 at 14:24
  • @RogueJedi When I read your comment I was thinking along that that I believe you were correct. Then looked away for a moment and had the thought that perhaps Dumbledore tried to get him to reveal the true memory? Of course he might have tried to get him to return too but pretty sure he tried to get the memory which is why he (Slughorn) was always prepared. And he (Dumbledore) certainly already had the fake memory so that would be something he tried to convince Horace to give up but Dumbledore realised Harry would have more luck. Finding that potion book and Liquid Luck...convenient. – Pryftan Mar 7 '18 at 19:29
30

A couple of reasons spring to mind:

  • Slughorn would only have taken the Potions position, which leaves Snape to fill the DADA role. That would be a difficult decision.

    Two reasons for that:

    1. Snape is valuable to the Order of the Phoenix. He doesn’t want to risk losing him to the DADA curse.

    2. Dumbledore’s judgement is already in question for musing Voldemort’s return, and his defence of Snape was always controversial. Claiming that Voldemort has returned, and then appointing an ex-Death Eater to teach DADA, will raise a few eyebrows.

    Dumbledore has enough hassle already without adding these problems to his plate.

  • He may not have had a choice in Umbridge’s employment.

    The official position is that the Ministry would only appoint a teacher if Dumbledore was unable to find a suitable alternative. The truth could be quite different.

    I think there’s a good chance that Umbridge was forced on Dumbledore. If so, he doesn’t have to reshuffle his other staff, there’s no hole in Potions, and hiring Slughorn is unnecessary. It’s the sort of thing Fudge would do, and Dumbledore may not have the political capital to resist.

    (Keeping Umbridge close may also be strategically useful. She may be annoying and dangerous at Hogwarts, but at least he can keep an eye on her. Keep your friends close, etc.)

  • Slughorn’s key value to Dumbledore is for horcrux memories. This would be of questionable utility in Order of the Phoenix.

    Two reasons for this:

    1. It’s not clear whether Dumbledore is even aware of horcruxes at this point. If he isn’t, then there’s much less reason to re-hire Slughorn.

    2. In Order of the Phoenix, he’s worried that Voldemort might have access to Harry’s mind (hence the Occlumency lessons). Getting Harry to probe Slughorn for horcruxes while Voldemort is watching is very risky.

    Both of these problems are resolved by the start of Harry’s sixth year.

  • By Half-Blood Prince, Slughorn is worn down by a year on the run.

    When he sees Harry and Dumbledore, he explains that he’s been on the move since the previous summer:

    Slughorn eyed Dumbledore balefully for a moment, then muttered, “I haven’t given them the chance. I’ve been on the move for a year. Never stay in one place more than a week. Move from Muggle house to Muggle house.”

    Half-Blood Prince, chapter 4 (Horace Slughorn)

    It’s quite possible that Dumbledore thought he would be unable to recruit Slughorn when he’d only just gone into hiding. It’s likely that he was keeping tabs on Slughorn, and would know he’d just tried to hide. Trying and failing to get him once might make it harder to recruit him in future.

  • He doesn’t want to risk Snape’s life with the DADA curse.

    As stated above, if he hired Slughorn for Potions then Snape goes to DADA.

    As a double agent, Snape is of great utility to the Order. But previous DADA teachers have often been incapacitated (Quirrell, Lockhart); it would be foolhardy to put such a valuable asset at risk, especially when he has other options.

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    I am fairly sure Dumbledore was aware of the use of Horcruxes in OotP, but he was unsure of the existence of multiple ones. "Four years ago, I received certain proof that Voldemort had split his soul." ... "No, something much more sinister had lived inside that book... a fragment of soul, I was almost sure of it. The diary had been a Horcrux." - HBP Ch. 23 Horcruxes – ssell Aug 28 '15 at 13:50
  • I think it's just Snape. Dumbledore isn't ready for Snape to teach DADA because he won't do more than a year and Slughorn I believe is a celebrated potions master. He doesn't want to teach DADA! – ThruGog Aug 29 '15 at 15:51
  • I'm not sure Dumbledore knew about the Harry-Voldemort connection until Harry returned to Hogwarts in Order of the Phoenix, so that would be too late to influence his decision on staff. – Anthony Grist Oct 31 '15 at 10:30
  • @AnthonyGist He's giving Harry the cold shoulder at the Ministry hearing and in Grimmauld Place. Even if he isn't sure of the connection, he certainly seems to be keeping his distance. – alexwlchan Jan 19 '16 at 16:44
5

Because there was no reason for him to hire Slughorn in year 5:

  • He didn't want Slughorn dead, so he would not hire him for DADA
  • He also didn't want to lose Snape, so he wouldn't move Snape to DADA (this needing a Potions Master).

So... we are STILL stuck with Umbridge for Year 5, and nothing useful for Slughorn to do.

Also, the whole point of Year 5 was to make life more depressing for "us". That's part of the craft of storytelling.

P.S. While largely tangential to the main question, another possible reason is that Dumbledore wouldn't have any chance to convince Slughorn in Year 5 - and he is smart enough to know that. Harry wasn't a positive celebrity yet (pre-MoM battle and Voldemort reappeairing) so Slughorn had no need to "collect" him; and Slughorn wasn't in need of protection from Death Eaters yet. (h/t/ Himarm)

  • slughorn probably wasn't on the run yet the summer before year 5, which is what made him desperate enough to seek the protection hogwarts offered him. – Himarm Aug 27 '15 at 20:11
  • @Himarm - that's irrelevant. The question wasn't why Slughorn wasn't employed in Hogwarts, but why Dumbledore didn't even TRY. I'll add for completeness though, thanks – DVK-on-Ahch-To Aug 27 '15 at 20:12
2

Some good reasons were given by the previous answers, but I think that a few more points may be raised.

  1. Politics.

    Claiming that Voldemort returned place Dumbledore in a difficult political position. Letting the ministry choose one of his teachers would appear as an attempt to avoid a direct confrontation (that he would probably lose). Complying with the ministry would soothe the fear that Fudge & co. were trying to spread.

  2. He did not yet have the idea

    Dumbledore was very clever, and was trying to plan several years in advance. However, it may happen that he did not yet have the idea of using Harry as a tool to convince Slughorn to give the real memory. He had other pressing matter at hand, and maybe the idea wasn't there yet.

  3. Relation with Harry.

    That year, if you recall, Dumbledore wanted to separate himself from Harry. And without close relation, he could not set Harry to the task and in particular impress on him the importance of the memory. Even the year afterwards, it was only after he started to show some of the memories that Dumbledore set Harry to the task or retrieving that memory. Which means some extra research.

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