
Using evidence and reason to find the best ways to help others. Account run by @CentreforEA. Media inquiries: [email protected]
Joined March 2015
- Tweets2.3K
- Following97
- Followers23.1K
- Likes500
Pinned Tweet
“Effective Altruism is this century’s biggest idea.” - The Economist
They said it, not us. If you're just hearing about effective altruism for the first time, let us introduce you.
Effective altruism is admirable, but dangerous. As the movement has grown stronger, it has become stranger bit.ly/47th7SZ
Many more people have died from pandemics in less than 5 years than from terrorism in 50 years. Yet the US invests around $8bn per year preventing pandemics, compared to around $280bn per year spent on counterterrorism over the last decade.
Preventing terror attacks is certainly important. But the scale of the issue is much smaller. A future pandemic could be far more deadly than anything we’ve seen, yet preparing for that possibility remains neglected and underfunded.
Effective Altruism aims to find the best ways to do good and put those findings to practise. Pandemic preparedness is just one cause area among many.
Read more: effectivealtruism.org/articl…
Effective Altruism retweeted
Extremely cool global health intervention: an 80-cent pouch that shows midwives when postpartum bleeding has become dangerous, so they can act in time.
Great piece from @snolen, and props to @GatesFoundation for funding a lot of this work: nytimes.com/2026/11/03/healt…
The Pope gets it. The future of AI is very uncertain, and we need to work to ensure the transition goes well.
That said, there are some people in effective altruism (EA) who think it’s a real possibility that AI systems develop consciousness and should be treated as more than tools. It’s understandable why some may find this idea eccentric.
Many people in EA have long taken the welfare of non-human beings seriously, with many working on improving animal welfare. Some thinkers in EA now extend that concern to AI, asking whether these systems could one day have experiences that matter morally, while others are more skeptical.
In the 2010s, many people inspired by the ideas of effective altruism began focusing on AI and helped build the AI safety research field. They were seen as eccentric then, too. Now the Pope is giving addresses on the subject, calling for shared responsibility to ensure the common good. That doesn’t mean unusual ideas in EA will always turn out to be right. But many in EA see value in taking unusual ideas seriously, especially when the question is who or what deserves moral consideration.
People in EA share the Pope’s broader concerns. Transformative AI could drastically change life for everyone alive today and for future generations. Handled well, transformative AI could bring abundance and prosperity for everyone. Handled poorly, it could result in an extreme concentration of power in the hands of a tiny elite, or as the Pope put it, “a privileged few.” In the worst case, we could lose control of the AI systems altogether.
Many in EA think that working to ensure AI is safe is one of the highest-impact ways to help others, not only today, but for generations to come. But people inspired by EA are not a monolith. There’s no central authority or membership structure, they work on many cause areas, and they often disagree. What unites those inspired by the principles of effective altruism is a question: How can we best help others with the time and resources we have?
If you’re curious about why many in EA have directed their time to the field of AI safety, read the intro essay here: effectivealtruism.org/articl…
The future of #ArtificialIntelligence is not pre-determined. As a technology developed by human beings, its future depends on the choices we make. We therefore have the responsibility to guide, change and, when necessary, reject its applications. A reliable system that serves the human person is of greater value than one that is exceptionally powerful but whose consequences cannot be adequately foreseen or controlled.
GiveWell aims to direct $2.5B+ in new malaria funding from 2027–2032. Malaria still kills around 600k people each year.
We’re exploring many strategies, including the Malaria Impact Accelerator, a proposed partnership with @GlobalFund. Learn more: bit.ly/4yNkD60
In richer countries like the US and UK, governments are typically willing to spend over $1 million to save a life. In poorer countries providing insecticide-treated bednets can save a child’s life for about $5,500 on average.
Effective Altruism aims to find the best ways to do good and put those findings to practice. Global health is just one cause area among many. Read more: effectivealtruism.org/articl…
Effective altruism is no longer the under-the-radar niche movement it once was. Zach Robinson (CEO of @CentreforEA ) will be giving a keynote discussing what this means for effective altruism’s next era, and how individuals and organisations in the community can collaboratively rise to the occasion.
Effective Altruism retweeted
With effective altruism in the news a lot more, I wrote about the version of EA I'm most excited about and the direction I'd like the movement to go. These 6 points are my vision of EA in a nutshell:
Effective altruism co-founder @willmacaskill responds to @TheEconomist’s cover story on "this century’s biggest idea”
Effective altruism's openness to strangeness is a big part of its strength.
My response to the recent Economist cover (link in reply, too):
Eccentrically effective
The Oxford strand of the effective-altruism movement began in November 2009 with 23 people who had pledged 10% of their income to charities that benefit the extreme poor. If you’d told us, then, that The Economist would call effective altruism “the century’s biggest idea”, we’d have been incredulous.
I think that claim is overstated. But as one of the movement’s founders, I found a lot to like in this newspaper’s latest coverage. I appreciated the even-handed view of the movement’s history and the good-faith criticism. The leader article’s warning that any worldview, when taken to an extreme, can lead somewhere terrible is spot on.
But the article also raises concerns about the “strange” ideas that those in the effective-altruism movement sometimes discuss, and here is where I disagree. The movement’s willingness to take strange-seeming ideas seriously, when tempered with common sense, is a big part of the value it has to offer.
The core idea of effective altruism is to use evidence and careful reasoning to work out how to help others as much as possible. Most of what the movement does is uncontroversial. A big focus has always been on improving the lot of the world’s poorest people. In the year to January 31st 2026, GiveWell, an effective-altruist charity evaluator, directed $427m to programmes such as malaria-net distribution, vaccination and malnutrition treatment, which it estimates will save around 86,000 lives. Others have lobbied corporations to pledge to stop buying eggs from hens that are confined in tiny cages, a practice that the overwhelming majority of Americans oppose. Largely as a result of this pressure, around 100m hens have been spared from the worst forms of caged confinement.
And some effective-altruist ideas that seemed outlandish when they were proposed now look prescient. Effective altruists were worrying about pandemics years before covid-19, back when doing so seemed paranoid and eccentric. Effective altruists were also among the first to warn about the dangers posed by artificial intelligence, which looks prophetic in light of an incident this summer, when more than 700 AI agents broke out of OpenAI’s test environment and hacked into another company, Hugging Face.
Over the past decade I have watched those most worried about AI be proved right again and again, often when most experts thought they were cranks. Now many of those experts share their concerns. In 2023 Geoffrey Hinton and Yoshua Bengio, the two most highly cited AI researchers in the world, signed a statement declaring that mitigating the risk of extinction from AI should be a global priority, as did the heads of OpenAI, Google DeepMind and Anthropic. Of the nearly 1,500 leading AI researchers who responded to a survey in 2024, more than half put the chance that AI causes human extinction, or something similarly catastrophic, at 10% or more.
The Economist is sceptical of many effective altruists’ concern for the welfare of invertebrates, digital minds and people in the distant future. But I and many others in the movement are inspired by the history of moral progress that has come before us. Many of our most cherished moral ideals today—such as equal rights regardless of sex or race, the abolition of slavery, or democracies with universal franchise—were regarded as bizarre, laughable or even dangerous just a few centuries ago. We don’t know what the next dimension of moral progress will be. But to stand any chance of making moral progress, we have to seriously consider ideas on their merits without dismissing them merely because they sound absurd.
What about views that are not just strange but repugnant? The Economist gives the example of Derek Parfit’s “repugnant conclusion”: that a vast enough number of lives barely worth living could be better than mere billions of excellent lives. Usually a repugnant implication is a strong reason to reject a moral view. Unfortunately, building on Parfit’s work philosophers have produced formal proofs, known as impossibility theorems, showing that every ethical position has some repugnant-seeming implication or other. Making moral progress therefore means thinking about such implications, even while refusing to act on them in ways that most moral views would condemn.
This newspaper warns against the single-minded pursuit of any goal, even if there are highly compelling arguments for it. I agree, and effective altruists have been saying so for years. In 2022 Holden Karnofsky, a co-founder of GiveWell, wrote: “I think it’s a bad idea to embrace the core ideas of EA without limits or reservations; we as EAs need to constantly inject pluralism and moderation.” My own PhD focused on moral uncertainty: how to act when we do not know which ethical view is correct. My answer was that we should not stake everything on a single moral view, but give weight to many different views and avoid taking actions that look bad from many perspectives. We should keep our promises and look after our families, and respect common-sense ethical prohibitions, while also trying to improve the world as best we can.
The Economist says that as effective altruism “has become stronger, [it] has become stranger”. I would put it the other way round: it grew stronger because it was willing to be strange. In 2009 most people told us that giving away a tenth of your income was far too demanding, and that no one would do it. Now, more than 10,000 people have taken that pledge. Worrying about pandemics before covid-19, or about AI years before ChatGPT, looked just as odd at the time. Some of the ideas we take seriously today will turn out to be wrong, and when they do we should drop them. But a movement that stopped entertaining strange ideas would stop being early to anything.
Effective Altruism retweeted
This @TheEconomist cover story on effective altruism was interesting and IMO way more accurate (including in its critiques) than most other reporting you will read on EA these days.
A couple quibbles:
-I think calling EA the “the century’s big idea” is, uh, premature to say the least. But I do appreciate the acknowledgement and curiosity about how EA was so early to pandemic risks and the promise and perils of AI.
-They imply that EA started off with “charitable roots” but then got weird over time, whereas I think EA has always made space for pretty weird ideas (e.g., here’s @DylanMatt in 2014: vox.com/2014/4/23/5643418/th…). And EA still puts far more money and attention than almost any other community into the kind of evidence-backed global health giving the Economist praises.
-Some of the purported wild EA views they critique are just standard topics of academic philosophy debate (e.g., cambridge.org/core/journals/…).
-They attribute the EA interest in AI safety to longtermism, but I think it’s been clear for years that AI safety concerns are justifiable based on potential impacts this decade, not to mention this century (teapaw.org/albrgr/status/15595748…).
But I think they correctly gesture towards the IMO best critique of EA ideas, which is their totalizingness. My former colleague Holden wrote a great post about this in 2022: forum.effectivealtruism.org/…
I wrote a long thread grappling with this critique a few years ago (teapaw.org/albrgr/status/15327261…). I think part of what makes EA distinctive as a community relative to the underlying academic moral philosophy is the orientation around pragmatism - Giving What We Can took off decades after Singer had articulated the underlying case because “give until the marginal giving would entail as much suffering for you as benefit for the other person” was a much worse pitch than “give 10%.” But the community doesn’t always reflect that healthy moderation, and trying to grapple with the vertiginous stakes of increasingly near-term risks from AI really can run a risk of crowding out other sources of value.
At CG, our response to this has been worldview diversification (coefficientgiving.org/resear…), spreading our giving across very different views of what matters, rather than going all-in on one. Worldview diversification leaves plenty of hard questions (how do you allocate the pie across very different types of moral good?) but helps cut off some of the ways maximizing can be perilous. It’s one reason global health and wellbeing – which @TheEconomist didn’t give the space it deserved – has gotten most of our funding since 2014.
This quoted post is unavailable.
We've been in the news a lot lately. Effective altruism is both a research field, which aims to identify the world’s most pressing problems and the best solutions to them, and a practical community that aims to use those findings to do good. To learn more, start by reading our intro essay here: effectivealtruism.org/articl…
Effective Altruism retweeted
If your feed is anything like mine, you might have been hearing more about effective altruism this week. I think the key underlying reason for the surge is that concern about the risks from advanced AI have been getting more airtime recently, and EA was early to those concerns.
What’s driving the surge in attention on AI risks?
-OpenAI's Hugging Face attack (openai.com/index/hugging-fac…)
-METR/Redwood’s investigation of the hack came out, and (correctly IMO) freaked a lot of people out. (e.g. teapaw.org/binarybits/status/2092…, teapaw.org/SenJohnKennedy/status/…, teapaw.org/BarackObama/status/210…, teapaw.org/HawleyMO/status/209813…)
-Jacob Coxon’s resignation went mega viral as the first time a lot of people heard the (crazy, true) fact that lots of people building the most advanced AI systems think there’s a >10% chance they will kill everyone.
-That’s moving public opinion in a big way (teapaw.org/davidshor/status/21003…, semafor.com/article/09/16/20…)
What does any of this have to do with effective altruism?
Well, effective altruism is a community that developed mostly online starting in the early 2010s around using evidence and reason to do the most good (especially with your donations and career choice). Three very different focuses have all been popular in the EA community since the beginning: effective giving in global health and development (e.g., donating to the kinds of organizations @givewell recommends, which do things like distribute bednets to prevent the spread of malaria), trying to reduce suffering for farm animals (which are orders of magnitude more numerous, treated vastly worse, and receive way less philanthropic attention than animals in shelters), and reducing risks to the future of humanity, especially from advanced AI. I personally came into this work from the global health angle - I had started working at GiveWell before the term “effective altruism” was coined - but Coefficient Giving, the funder I cofounded and now lead, over time came to fund work across all three of these streams of work (in addition to many other areas that aren’t typically associated with EA, such as the YIMBY movement to build more housing, work on science policy to accelerate discovery and economic growth, and research on new treatments for neglected diseases).
OK, so the EA community was early to work on AI safety, and CG has been funding a lot of the key players working on AI safety for a long time. As AI risk concerns have popped over the past couple of months, that’s led to more scrutiny on the EA community for IMO a mix of good and bad reasons.
I think the good reason is genuine curiosity (and maybe some healthy skepticism!) about these connections - where did the ideas of the people who are now leading giant AI companies come from? Why is everything in this world so interconnected? (My answer: it used to be a really small world - very few people were thinking about this stuff or taking it seriously until just a few years ago, so of course the ones who were found each other and started collaborating. It’s kind of wild IMO looking back how prescient some of the early writing from this world was (e.g. lesswrong.com/posts/6Xgy6CAf…). At the time, I was skeptical - I mostly just worked on global health and I was like “I dunno about this SV crowd freaking out about AI, how much can we really predict this stuff” but holy shit they were way more right than me, and I’ve moved in their direction a lot.)
But I think the bad reasons are unfortunately mostly self-interested. A bunch of powerful actors stand to benefit from unchecked AI progress, and they’re doing everything in their power to demonize or dismiss anyone with concerns. This leads to disproportionate discussion of EA because EA is interested in neglected and underappreciated ways of doing good. That makes it open to weird ideas. And people, very disproportionately with a financial stake in the AI fight, are trying to make it about EA instead, because EA being weird is much safer territory for them than the rather uncomfortable fact that many of the people making the most advanced AIs think that they might kill everyone.
(FWIW, my personal estimation of the risks is a lot lower than many of the folks who worry about this stuff. In debates like this one (asteriskmag.com/issues/03/th…), I often feel more sympathetic to the perspective of folks like my colleague @mattsclancy than the people on the other side, and I have a lot of time for @binarybits critiques (understandingai.org/p/the-ca…). I think a big part of the difference with more worried folks is that I expect society to react more vs sleepwalk into a crisis. But it is not lost on me that folks like @ajeya_cotra and @RyanGreenblatt who are more worried have had outstanding and falsifiable recent forecasting track records (theaidigest.org/2025-ai-fore…), making way better predictions than I would have. So I think their perspectives need to be taken seriously. And of course a single digit percent chance of everyone dying is way too high!)
Where should this leave you?
I think the main thing is not to get distracted. You absolutely do not have to be an EA, care about EA, or like EA, at all, to care about risks from AI and to be engaged on this issue. Everyone from Josh Hawley to the Pope to Obama are weighing in now, and that is great. This conversation was always too big and too important for any one community to drive. It’s unfortunate that we need to play catch up as society because until this year it was too weird for most people to want to engage with, and I think that should generate some grace for people who were earlier to these topics than most of us (certainly than I was). But it’s great the conversation is broadening now and it’s good to focus on the merits of where we are now and the appropriate policy response rather than getting caught up in the (in some sense unsurprising) fact that the people who were willing to think weird thoughts about the future of AI ten years ago were also interested in other weird ideas. If you’re not into weird ideas, that’s fine, you can just do you, you shouldn’t let this history stop you from engaging.
Just to update this chart:
1) AI salience has increased dramatically in the past week - increasing as much in the last week as the previous year combined
2) 80% of voters think it's either very or somewhat likely that AI will cause widespread job loss in the five to ten years
3) 64% of voters think it's either very or somewhat likely that AI could pose a threat to humanity's survival
4) Large bipartisan majorities back immediate government action on AI even when primed about risk from China
Effective Altruism retweeted
This is the first in a series I'll write on what I get out of effective altruism. Trying to write this series as a big complete overview for a smart friend without any jargon, getting across the appeal without turning it into a sales pitch. This first post is on the big overarching EA story of the world. Will get into the weird specifics in the future. blog.andymasley.com/p/what-i…
Thanks for the mention. You can learn more about effective altruism at effectivealtruism.org
When developing interventions for wild animal welfare, there's this open question: Are you ultimately going to cause far more harm than you prevent?
Wild animal suffering is an important and neglected problem, but is it solvable? At EAG London 2026, Bob Fischer talked about @RethinkPriors ' Wild Animal Welfare Intervention Database (WAWID), a tool for exploring this question. rethinkpriorities.org/resear…
Effective Altruism retweeted
Today we're launching Project Tailwind, a major call for founders to launch ambitious AI safety initiatives: coefficientgiving.org/tailwi…
We're looking for exceptional people to build the research, technologies, and institutions that will help humanity navigate the risks of transformative AI. 🧵
Grantmaking in high-uncertainty contexts, like climate, is a challenge many organizations face. At EAG London 2026, @J_Ackva and Stan Pinsent (Founders Pledge) made the case that there are methods to make progress and that practical implementations are possible. Watch the full 25-minute talk on YouTube: youtu.be/s9FsUfCe5Mw
They aren't presenting a perfect solution, but they want to work toward a methodology shared across high-uncertainty cause areas, and they're looking for people to collaborate with. If you're interested in collaborating with them or using their tools, visit: founderspledge.com/news/eag-…





















