Since the Death Eaters were killing or otherwise preventing Muggle-borns from practicing magic, how did they plan to keep the wizards from dying out after a couple generations once there were not enough pure-bloods to keep the population going?

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    Wouldn’t acknowledging the danger of wizards becoming extinct, if only pure-bloods are kept, be connected with admitting that most Death Eaters and even Voldemort himself are not pure-bloods? I doubt that their ideology allowed to reasonably discuss about the consequences of their doing.
    – Holger
    Commented Jun 15, 2018 at 9:03
  • 3
    Well, his plan was to live forever, wasn't it? Ensuring the Wizarding population would never drop below 1... Commented Jun 15, 2018 at 13:36
  • Why wouldn't they be able keep the population going? Repopulating is a thing.
    – Misha R
    Commented Jun 17, 2018 at 16:35

1 Answer 1


Yes, it’s likely why they made an effort to preserve magical blood.

The Dark Lord and the Death Eaters did try to avoid killing anyone who wasn’t a Mudblood, even when they were clearly an enemy - this was likely to preserve enough to continue the wizarding population. We see this clearly when the Dark Lord offers the chance to those fighting to join him. He tells them he’d prefer them not to die because every drop of magical blood spilled is a loss.

“You have fought,’ said the high, cold voice, ‘valiantly. Lord Voldemort knows how to value bravery.

‘Yet you have sustained heavy losses. If you continue to resist me, you will all die, one by one. I do not wish this to happen. Every drop of magical blood spilled is a loss and a waste.

‘Lord Voldemort is merciful. I command my forces to retreat, immediately.”
- Harry Potter and the Deathly Hallows, Chapter 33 (The Prince’s Tale)

Then, he offered them yet another chance to join him when he thinks Harry is dead. By then, they’d been fighting him for quite a while - it seems fairly clear that the only reason he’d give them so many chances to live despite being obviously opposed to him is his desire not to spill magical blood, because he knew he’d need enough wizards alive to sustain the society he was building. This was clearly something he’d considered and thought important.

“The battle is won. You have lost half of your fighters. My Death Eaters outnumber you and the Boy Who Lived is finished. There must be no more war. Anyone who continues to resist, man, woman or child, will be slaughtered, as will every member of their family. Come out of the castle, now, kneel before me, and you shall be spared. Your parents and children, your brothers and sisters will live, and be forgiven, and you will join me in the new world we shall build together.”
- Harry Potter and the Deathly Hallows, Chapter 36 (The Flaw in the Plan)

They certainly weren’t all pure-blood, but he gave them all a chance to join him in the new wizard order he was creating. He tries to get Neville to join him as well, especially because Neville is a pure-blood and therefore more valuable than the average wizard.

“But you are a pure-blood, aren’t you, my brave boy?’ Voldemort asked Neville, who stood facing him, his empty hands curled in fists.

‘So what if I am?’ said Neville loudly.

‘You show spirit, and bravery, and you come of noble stock. You will make a very valuable Death Eater. We need your kind, Neville Longbottom.”
- Harry Potter and the Deathly Hallows, Chapter 36 (The Flaw in the Plan)

He definitely did have a plan, and considered how the population of wizards would continue. The Dark Lord would certainly want his wizard society to be sustainable. He was also planning on being immortal, and he’d want the world he created to live on at least as long as he would - which would be forever. He wouldn’t want to watch it crumble due to wizards dying off. As for whether it’d work, that’s a different question, but he did think of it and plan based on it. However, especially if we count wizards who aren’t Mudbloods from other countries, as I wrote in another answer, it seems likely it could. Also, it was all who weren’t Mudblood, not only the pure-blood.

They wanted Mudbloods gone - people related to a wizard stayed.

The Dark Lord and the Death Eaters wanted Mudbloods locked up or killed, but anyone who could prove they had a close enough wizard relative was allowed to remain free.

“Nevertheless, unless you can prove that you have at least one close wizarding relative, you are now deemed to have obtained your magical power illegally and must suffer the punishment.”
- Harry Potter and the Deathly Hallows, Chapter 11 (The Bribe)

The pool of wizards who would live in the Dark Lord’s society would include anyone who could prove a close wizarding relative, not just pure-bloods. The pure-bloods would likely have a higher status, but there would be far more wizards around than just them.

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    Were there sufficient numbers to maintain genetic diversity though?
    – Broklynite
    Commented Jun 15, 2018 at 2:02
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    @Broklynite That’s less clear, but I do think it’s possible as I say in my linked answer, taking into account scientific research on minimum viable populations and statistics of how many wizards exist. Though I included Muggle-borns there, there would probably still be enough wizards worldwide to maintain a healthy population, as Muggle-borns seem to be a relatively small segment of the population. However, as the question is about whether the Dark Lord had a plan rather than whether the Dark Lord’s plan would actually work, I didn’t include that much on its chance of working.
    – Obsidia
    Commented Jun 15, 2018 at 2:11
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    I doubt Voldemort knew the first thing about genetics, so he probably never even thought about it. But I think Bellatrix is right: I don't recall his regime making any specific effort to persecute Muggles who were married to witches or wizards, or of witches and wizards who had married Muggles, or of their children. Assuming that remained the case, I would imagine that the occasional mixed marriage would probably be enough to keep the wizarding community from extinction. Commented Jun 15, 2018 at 3:49
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    @HarryJohnston I do recall that Voldemort hated the idea of 'mating' with Muggles, to use his own words. Commented Jun 15, 2018 at 5:48
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    I would not place any bet on “the Dark Lord’s society would include … not just pure-bloods”. Like in similar dictatorships, there’s a group of people who are killed first and there are groups of people who are not killed yet. And this form of government needs a constant availability of scapegoats, even if the the first group has become extinct. And don’t try reminding Voldemort that he isn’t a pure-blood either. That won’t work.
    – Holger
    Commented Jun 15, 2018 at 9:09

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