A personal letter on transformative AI
George Rosenfeld, Deputy Director for Global Catastrophic Risks at Coefficient Giving, shares a personal letter explaining his growing concern about the rapid development of transformative AI. He outlines how AI could drastically alter society by automating most human tasks, accelerating scientific progress, and potentially surpassing human control. While uncertain about the outcomes, he believes the world is underestimating the pace and magnitude of change ahead.
- ▪George Rosenfeld works on the Navigating Transformative AI program at Coefficient Giving, focusing on preparing for high-impact AI developments.
- ▪He argues that AI could soon automate most human tasks, compress decades of scientific progress into years, and challenge humanity's control over its future.
- ▪Rosenfeld acknowledges his views are not mainstream but says his skepticism has diminished as AI progress consistently exceeded his expectations.
- ▪He compares the potential AI transformation to the pre-COVID moment in early 2020, suggesting the coming changes could be far more profound and irreversible.
- ▪Since the letter was written, Anthropic reportedly reached $45 billion in annualized revenue and developed Mythos, an AI model claimed to detect security flaws across all major operating systems and browsers.
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| Original publisher | Hacker News (AI / LLM) |
| Canonical URL | https://multipliercg.substack.com/p/a-personal-letter-on-transformative |
| Publication time | Sat, 16 May 2026 13:17:57 +0000 |
| Retrieval time | 2026-05-16T13:30:18.594Z |
| Last seen | 2026-05-16T13:30:18.594Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
| Excerpt method | First ~120 words (~800 chars) of extracted publisher body, fair-use limited. |
| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | nNg3FpXxgpgl |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
A personal letter on transformative AIMaking sense of rapid AI progressGeorge RosenfeldMay 15, 20262526ShareGeorge Rosenfeld is Deputy Director for Global Catastrophic Risks at Coefficient Giving, which covers our Navigating Transformative AI and Biosecurity funds. In April, he wrote a letter to his friends and family about why he thinks AI could transform the world in the coming years, and why the current trajectory worries him.It’s a personal letter, written for people who are encountering these arguments for the first time. We’re sharing it because we think more people should be having these kinds of conversations.Note: this letter was shared at the start of April.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at Hacker News (AI / LLM).
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