According to Kevin Esvelt on the recent 80,000k podcast (excellent btw, mostly on biosecurity), eliminating the New World New World screwwormcould be an important farmed animal welfare (infects livestock), global health (infects humans), development (hurts economies), science/innovation intervention, and most notably quasi-longtermist wild animal suffering intervention.
More, if you think there’s a non-trivial chance of human disempowerment, societal collapse, or human extinction in the next 10 years, this would be important to do ASAP because we may not be able to later.
From the episode:
Kevin Esvelt:
...
But from an animal wellbeing perspective, in addition to the human development, the typical lifetime of an insect species is several million years. So 106 years times 109 hosts per year means an expected 1015 mammals and birds devoured alive by flesh-eating maggots. For comparison, if we continue factory farming for another 100 years, that would be 1013 broiler hens and pigs. So unless it’s 100 times worse to be a factory-farmed broiler hen than it is to be devoured alive by flesh-eating maggots, then when you integrate over the future, it is more important for animal wellbeing that we eradicate the New World screwworm from the wild than it is that we end factory farming tomorrow.
Dropping a longer quote with more context in this footnote.[1] A quick Google Images search makes this all the more visceral, but be warned that it’s kinda graphic.
I would really love to see someone (maybe me) do a deeper dive into this and write up a proper Forum post.
Kevin Esvelt: So the fourth one might actually be the easiest to get going: the New World screwworm, which has the amazing scientific name of Cochliomyia hominivorax: “the man devourer.” But it doesn’t primarily eat humans; it feeds indiscriminately on warm-blooded things, so mammals and birds. It’s a botfly that lays its eggs in open wounds, anything as small as a tick bite. And it’s called the screwworm because the larvae are screw-shaped and they drill their way into living flesh, devouring it. And as they do, they cultivate bacteria that attract new gravid females that lay more eggs and continue the cycle.
So you have this macabre dance of parasitisation that results in the animal being devoured alive by flesh-eating maggots. And we know that it’s horrendously painful, because people get affected by this, and the standard of treatment is you give them morphine immediately so that surgeons can cut the things out — because it’s just that painful; it’s unbelievably agonising. And by my back-of-the-envelope calculations, there’s about a billion hosts of this every year — so a billion animals are devoured alive by flesh-eating maggots every single year.
We even know that we can eradicate this species from at least many ecosystems and not see any effects, because it used to be present in North America too, and we wiped it out using nuclear technology, oddly enough. Some clever folks noticed if you irradiate the larvae, then they grow up sterile. And if you release enough of them, then the wild ones will mate with a sterile one, and they only mate once, so you can suppress the population to the point of not being there anymore.
So we did this first up through Florida and then across the West, and then down through Texas to the Mexican border. The US Department of Agriculture then inked a deal with the Mexican government to eradicate them from Mexico because the southern border was shorter and therefore cheaper. And then they just went country by country down Central America to Panama. The southern border of Panama is the shortest, so American taxpayer dollars today contribute to the creation and maintenance of a living wall of sterile screwworm flies released in southern Panama that prevents the South American screwworm from reinvading North America — 10 million released every week.
Luisa Rodriguez: Wow.
Kevin Esvelt: But there’s too many of them in South America to wipe out by that means. And so the way forward is obviously gene drive. If the Mercosur countries agree that they want to get rid of the New World screwworm, they can start with something like a daisy drive locally — and Uruguay is working on this — then they can wipe it out from their country. Uruguay loses about 0.1% of their total country’s GDP to the screwworm because they’re so dependent on animal exports. I mean, Uruguay and beef is… To those listeners who eat beef, I’m going to start fights here, but it’s better than beef from Argentina, even. But anyway, they’re all very concerned about their beef, and screwworm is horrific.
It also, of course, preferentially hurts poor farmers who struggle to afford the veterinary treatments for their animals. And of course, they hate to see it, because here you’re watching these animals that you’re caring for literally get devoured by flesh-eating maggots, and it’s agonisingly painful.
But from an animal wellbeing perspective, in addition to the human development, the typical lifetime of an insect species is several million years. So 106 years times 109 hosts per year means an expected 1015 mammals and birds devoured alive by flesh-eating maggots. For comparison, if we continue factory farming for another 100 years, that would be 1013 broiler hens and pigs. So unless it’s 100 times worse to be a factory-farmed broiler hen than it is to be devoured alive by flesh-eating maggots, then when you integrate over the future, it is more important for animal wellbeing that we eradicate the New World screwworm from the wild than it is that we end factory farming tomorrow.
According to Kevin Esvelt on the recent 80,000k podcast (excellent btw, mostly on biosecurity), eliminating the New World New World screwworm could be an important farmed animal welfare (infects livestock), global health (infects humans), development (hurts economies), science/innovation intervention, and most notably quasi-longtermist wild animal suffering intervention.
More, if you think there’s a non-trivial chance of human disempowerment, societal collapse, or human extinction in the next 10 years, this would be important to do ASAP because we may not be able to later.
From the episode:
Dropping a longer quote with more context in this footnote.[1] A quick Google Images search makes this all the more visceral, but be warned that it’s kinda graphic.
I would really love to see someone (maybe me) do a deeper dive into this and write up a proper Forum post.