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The ethics of existential risk is the study of the ethical issues related to existential risk, including questions of how bad an existential catastrophe would be, how good it is to reduce existential risk, why those things are as bad or good as they are, and how this differs between different specific existential risks. There is a range of different perspectives...

Psychedelics are a class of psychoactive substances that alter perception, mood, and cognition, and have been investigated for their therapeutic potential, particularly in mental health treatment. Within the effective altruism (EA) community, psychedelics have gained attention as a potentially high-impact intervention due to their promising results in treating...

An altruistic wager is a type of argument that seeks to establish that an agent should act as though a conclusion is true because, given what we know, that seems to be the right decision from an ethical perspective, even if the conclusion does not actually seem likely to be true. For example, one might argue that one should act as though animals are sentient...

Altruistic coordination is the study of how individual altruists should act when the impact of each person's decisions depends on the actions of other altruists. Such coordination could take many forms, including philanthropic coordination; moral trade; attempting to consider comparative advantage and replaceability rather than just personal fit; building "community...

The books tag covers posts about books.

If you're looking for summaries and reviews, you might also find LessWrong's "Book reviews" tag relevant. On the Forum, the "collections and resources" tag might also be related. 

Some EA books have their own tag: The Precipice | Doing Good Better  | Poor Economics | Superintelligence | The Life You Can Save | ...

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Soil animals are terrestrial invertebrates that spend most of their life in soil or litter (e.g., nematodes, mites, springtails, earthworms, many ants and termites).litter. They are extremely numerous and influence nutrient cycling, plant growth, and carbon dynamics. Recent EA Forum work arguesExamples of soil animals include soil ants, termites, springtails, mites, and nematodes. Each of these groups is much more numerous, and has many more neurons in total than wild vertebrates and farmed animals. Vasco Grilo argued overall changes in welfare may be determined by effects on soil animals, even accounting for soil ants and termites only, instead of effects on the beneficiaries targeted by interventions. However, there is large uncertainty about the expected intensity of the subjective experiences of soil animals, whether they may dominate animal-year counts relevanthave positive or negative, and what increases or decreases their population. So Vasco advocated for more research on informing how to increase the welfare analyses, but their sentience and net welfare remain highly uncertain.of soil animals over pursuing whatever land use change interventions naively seem to achieve that the most cost-effectively.

animal welfare | wild animalartificial sentience | invertebrate welfare | moral circle expansion | moral weight | digital mindsnematode welfare | wild animal welfare

FarmKind "connect[s] compassionate people with impactful charities that are fixing factory farming".

FarmKind "connect[s] compassionate people with impactful charities that are fixing factory farming"

Rethink Priorities is a think tank dedicated to informing decisions made by high-impact organisations and funders . We workfunders. It works across various cause areas such as  longtermism (including forecasting,  AI governance, and nuclear risks), building effective altruism, animal welfare (for both farmed and wild animals), and global health and development.

The Center for Wild Animal Welfare (CWAW) is a new policy advocacy organization, working to improve the lives of wild animals today and build support for wild animal welfare policy.

The Center for Wild Animal Welfare

The Center for Wild Animal Welfare (CWAW) is a new policy advocacy organization, working to improve the lives of wild animals today and build support for wild animal welfare policy.

Holden Karnofsky (born 1981) is an American philanthropist. He is a visiting scholar Carnegie Endowment for International Peace.member of technical staff at Anthropic.

Coefficient Giving's leadership can be viewed on its team page.[5] At present, Alexander Berger is the CEO, and Cari Tuna is Coefficient Giving's president, and Holden Karnofsky and Alexander Berger are its two co-CEOs. Karnofsky oversees grantmaking in biosecurity, AI safety and longtermism, while Berger oversees grantmaking in global health and development, farmed animal welfare, scientific research and other areas within global health and wellbeing.[5]

Funding opportunities

Applications are currently open for young individuals interested in obtaining financial support for pursuing careers that help improve the long-term future.[6]chair.

Walsh, Bryan (2025) One of the world's most influential philanthropies is changing its name. Here's why it matters.Vox, November 18.

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    Karnofsky, Holden (2011) Announcing GiveWell Labs, The GiveWell Blog, September 8 (updated 2 September 2014).

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    Karnofsky, Holden (2014) Open Philanthropy Project (formerly GiveWell Labs), Open Philanthropy, August 20.

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    Karnofsky, Holden (2017) The Open Philanthropy Project is now an independent organization, Open Philanthropy, June 12.

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    Berger, Alexander (2025) Open Philanthropy Is Now Coefficient Giving, Coefficient Giving, November 18.

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    Karnofsky, Holden (2021) Open Philanthropy’s new co-CEOTeam, Open PhilanthropyCoefficient Giving, June 15.

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    Open Philanthropy (2020) Early-career funding for individuals interested in improving the long-term future, Open Philanthropy, August 31.November 20.

  7. Show all footnotes

Soil animals are terrestrial invertebrates that spend most of their life in soil or litter (e.g., nematodes, mites, springtails, earthworms, many ants and termites). They are extremely numerous and influence nutrient cycling, plant growth, and carbon dynamics. Recent EA Forum work argues they may dominate animal-year counts relevant to welfare analyses, but their sentience and net welfare remain highly uncertain.

 

Related entries

animal welfare | wild animal welfare | moral circle expansion | moral weight | digital minds

Ambitious Impact — Does research into the most effective interventions and incubates charities to implement these interventions.

Charity Entrepreneurship — Does research into the most effective interventions and incubates charities to implement these interventions.

Coefficient Giving — Aims to help philanthropy improve lives effectively through research and grantmaking. Makes grants in areas including U.S. policy, farm animal welfare and global catastrophic risks.

Legal Priorities ProjectInstitute for Law & AI — Conducts legal research that tackles the world’s most pressing problems. Currently focusing on artificial intelligence, synthetic biology, climate change and institutional design.

Open Philanthropy — Aims to help philanthropy improve lives effectively through research and grantmaking. Makes grants in areas including U.S. policy, farm animal welfare and global catastrophic risks.

Coefficient Giving (previously Open Philanthropy (previously the Open Philanthropy Project) is a research and grantmaking foundation based in San Francisco.

Open PhilanthropyCoefficient Giving launched in late 2011, as a partnership between Good Ventures and GiveWell.[1] The partnership operated under the name GiveWell Labs before adopting, in August 2014, the name Open Philanthropy Project.[2] It continued to be part of GiveWell until 2017, when it became an independent organization.[3] The name was changed to Open Philanthropy around December 2019.2019, and Coefficient Giving in November 2025.[4]

Cari Tuna is Open Philanthropy'Coefficient Giving's president, and Holden Karnofsky and Alexander Berger are its two co-CEOs. Karnofsky oversees grantmaking in biosecurity, AI safety and longtermism, while Berger oversees grantmaking in global health and development, farmed animal welfare, scientific research and other areas within global health and wellbeing.[4]5]

Applications are currently open for young individuals interested in obtaining financial support for pursuing careers that help improve the long-term future.[5]6]

Wiblin, Robert (2017) You want to do as much good as possible and have billions of dollars. What do you do?, 80,000 Hours, October 11.
An interview with Nick Beckstead, a former program officer at Open Philanthropy.Coefficient Giving.

Wiblin, Robert & Keiran Harris (2018) The world’s most intellectual foundation is hiring. Holden Karnofsky, founder of GiveWell, on how philanthropy can have maximum impact by taking big risks, 80,000 Hours, February 27.
An interview with Holden Karnofsky, Open Philanthropy'Coefficient Giving's former CEO.

Open PhilanthropyCoefficient Giving. Official website.

  1. ^

    Karnofsky, Holden (2011) Announcing GiveWell Labs, The GiveWell Blog, September 8 (updated 2 September 2014).

  2. ^

    Karnofsky, Holden (2014) Open Philanthropy Project (formerly GiveWell Labs), Open Philanthropy, August 20.

  3. ^

    Karnofsky, Holden (2017) The Open Philanthropy Project is now an independent organization, Open Philanthropy, June 12.

  4. ^

    Berger, Alexander (2025) Open Philanthropy Is Now Coefficient Giving, Coefficient Giving, November 18.

  5. ^

    Karnofsky, Holden (2021) Open Philanthropy’s new co-CEO, Open Philanthropy, June 15.

  6. ^

    Open Philanthropy (2020) Early-career funding for individuals interested in improving the long-term future, Open Philanthropy, August 31.

  7. Show all footnotes

During Marginal Funding Week (November 17 - 23), organisations post about their funding gaps, and what they could achieve with extra funding. [Here's a fancy page that also showcase Marginal Funding Week posts.]

You can check out our special Marginal Funding page Apply nowhere

Looks like legal priorities project transfered to https://law-ai.org/