●●○ medium
There is no confirmed −; independently verified + decide the position (A). No unreachable strike-through.= non-additive meter
Evidence Action: Scaling RCT-proven interventions cheaply. There is often a wide gap between rigorous research showing something “works” and it actually reaching people at scale. Evidence Action, spun off from Innovations for Poverty Action in 2013, exists to bridge it — scaling RCT-proven interventions, through governments, extremely cheaply. Flagship Deworm the World partners with governments in India, Nigeria, Pakistan, Kenya, and elsewhere for school-based mass deworming — treating parasitic infections that erode children's health, growth, and schooling. The approach builds on research by Michael Kremer and Esther Duflo (2019 Nobel economics laureates), and J-PAL ranks school deworming a “best buy” (one of the most cost-effective interventions). Since 2014 it has delivered over 1.8 billion treatments — 249 million children in 2022 alone — at under $0.50 each ($0.05 in India). Its Safe Water program installs free chlorine dispensers at rural water points in Kenya, Uganda, and Malawi, reaching 5–6 million people, estimated to prevent millions of cases of child diarrhea and save thousands of young lives — for about $1 per person a year. From 2013 to 2022, GiveWell repeatedly named Deworm the World a “top charity” — one of the world's most cost-effective. The letter is A; certainty is medium. Unconfirmed concerns are placed under “Watching.” (As of 2026-Q2; estimate based on public information.)
Main narrative
There is often a wide gap between rigorous research showing something “works” and it actually reaching people at scale. Evidence Action, spun off from Innovations for Poverty Action in 2013, exists to bridge it — scaling RCT-proven interventions, through governments, extremely cheaply.
Flagship Deworm the World partners with governments in India, Nigeria, Pakistan, Kenya, and elsewhere for school-based mass deworming — treating parasitic infections that erode children's health, growth, and schooling. The approach builds on research by Michael Kremer and Esther Duflo (2019 Nobel economics laureates), and J-PAL ranks school deworming a “best buy” (one of the most cost-effective interventions). Since 2014 it has delivered over 1.8 billion treatments — 249 million children in 2022 alone — at under $0.50 each ($0.05 in India). Its Safe Water program installs free chlorine dispensers at rural water points in Kenya, Uganda, and Malawi, reaching 5–6 million people, estimated to prevent millions of cases of child diarrhea and save thousands of young lives — for about $1 per person a year. From 2013 to 2022, GiveWell repeatedly named Deworm the World a “top charity” — one of the world's most cost-effective.
One person’s story (N1)
+ before → after
A rural child at school. Infected with parasites, anemic and malnourished, their growth and learning hindered — often the child and family don't even realize it's an illness. In Deworm the World's school-based mass deworming, taking a single pill costing about $0.05 restores the child's health, so they attend more and can learn. A long-term follow-up study in Kenya shows that those dewormed as children had better health, education, and income as adults. One pill changes the trajectory of that child's life.
Source nature: Innovations for Poverty Action / J-PAL / P1 RCT (randomized controlled trial). Positive effects are not used to offset negatives.
Positive / negative effects
+ effects
- Evidence Action's Deworm the World was repeatedly named a GiveWell (a rigorous charity evaluator) “top-rated charity” from 2013–2022, called “among the world's best for social impact per dollar.” School-based mass deworming builds on the research of 2019 Nobel economics laureates Michael Kremer and Esther Duflo, and J-PAL ranks it a “best buy.” Dispensers for Safe Water (point-of-source chlorination) is supported by a Cochrane review of 15 RCTs, and GiveWell estimated it about 5–7× as cost-effective as cash transfers.P1 independent evaluation/RCT / GiveWell / Cochrane / J-PAL
− effects (confirmed)
- No confirmed −.
- Continuous verification of each intervention's usage rate/outcomes; settling the deworming-effect debate; updating cost-effectiveness estimates; the quality of government partnerships and per-country replicability
A second look
The “magnitude” of deworming's long-term health/education effects is academically contested (the so-called “worm wars” — some meta-analyses question the effect). GiveWell revised down the cost-effectiveness of its safe-water work (because actual chlorine-dispenser usage in Kenya was lower than assumed, about 7× → about 5×). Benefits are estimated as expected values (cases prevented, lives saved), with uncertainty in actual usage and attribution. Some programs, like No Lean Season, were discontinued when the effect couldn't be confirmed (also a sign of transparency).
Sources
How to read this assessment
- Reachable upper bound (ceiling): a confirmed − sets the ceiling, and independently verified + decide the position within it. + do not cancel out −.
- The weight of evidence is not symmetric: only confirmed − are counted; the volume of disputes or allegations goes under “Watching.” + are counted from independent evidence, while an organization’s own PR is treated as “reference.”
- Size is not value: scale is not used in the assessment. Matters that stay within money or competition—investors, shareholders, sanctions, trade secrets—are also excluded.
- The letter (assessment) and certainty (how reliable the information is) are separate axes.
This is a translation; the Japanese version is authoritative. The assessments here are generated automatically by AI based on published criteria. The operator does not alter individual results. Because they are AI-generated they may contain errors, and they are opinion and commentary, not statements of fact. Where evidence is insufficient, the entry is marked “On hold.” Requests for correction are accepted via the form.
Terms: Narrative Value = an assessment (A–G) of the distance between the story an organization tells and its reality / Ceiling meter = a visualization of the reachable upper bound / Watching = unconfirmed matters not counted / Protected stakeholders = people, animals, nature, and future generations. | Generated by: AI | As of: 2026-Q2 | Back to top