Updates from the GiveWell blog

AI Use Note: Main body text entirely human written. Claude (Opus 4.8) helped develop models of animal life histories in the appendix. Cross-posted from Good Structures. Executive Summary * Animal advocates sometimes make claims like “there are X of this animal...

“How long have you been v*g*n?” This is one of the most common icebreakers at animal protection events. It’s a baseline assumption, and it mostly holds true: if you’re out advocating for animals not to be tortured or abused, realistically these days you are v**n, or close. And it makes for good conversation. It seems fairly safe to assume when you meet strangers. But this assumption is hurting the movement in a way which we don’t always notice: someone new comes into the sp...

Summary Back in November 2023 I posted here to launch Spiro and raise our first $198k. Two and a half years later this is an update and a fundraiser for the next step. The short version: we've now reached over-5,900 people with TB preventive medicine, including over 3,000 children under five years old. Our early results have held up well an...