The Einstein-Szilárd letter of 2 August 1939 warns Roosevelt about fission as a dated weapons-advice file
On 2 August 1939 the Einstein-Szilárd letter warned Roosevelt about fission. Albert Einstein's documented role is: He signed a letter Szilárd drafted. In the causal graph this event weakens Energy Security, a driver that strengthens Poverty headcount ratio at $3.00 a day (2021 PPP) (% of population) — an improving welfare path.
Read the full account
On 2 August 1939 the Einstein-Szilárd letter warned Roosevelt about fission. Szilárd drafted. Einstein signed. He did not direct Los Alamos. Albert Einstein's documented role is: He signed a letter Szilárd drafted. Roosevelt's later project is others' execution; the warning is this paper.
Context
Sachs delivered. Sharing the paper with Szilárd is required. The setting of The Einstein-Szilárd letter of 2 August 1939 warns Roosevelt about fission as a dated weapons-advice file is the public file around 1939-08-02.
That reading is an impact-path choice, not a property stored on the Fact itself.
Why it matters
Worsening path from The Einstein-Szilárd letter of 2 August 1939 warns Roosevelt about fission as a dated weapons-advice file on 1939-08-02. The welfare reading on this path is worsening.
Shared responsibility is part of The Einstein-Szilárd letter of 2 August 1939 warns Roosevelt about fission as a dated weapons-advice file. Naming Albert Einstein does not delete co-authors, institutions, or later transmitters. The lag from 1939-08-02 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.
Who was responsible
Contribution type and responsibility level for each recorded actor — not sole-author shorthand.
Albert Einstein
PersonDirect responsibility
responsibility level 0.56 · verified
He signed a letter Szilárd drafted. Roosevelt's later project is others' execution; the warning is this paper.
What changed
Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.
- FactThe Einstein-Szilárd letter of 2 August 1939 warns Roosevelt about fission as a dated weapons-advice file
- weakensDriverEnergy Security
- strengthensIndicators (4)Poverty headcount ratio at $3.00 a day (2021 PPP) (% of population)
impact weight 0.55 · Effect from 2 August 1939 · verified
Strengthens · Relationship strength 0.34 (weight 0.55 × strength 0.62)
Observed
10.4% · 10.2 above the normal line (2024)
Worse than normal7 readings, 2018–2024: fell from 11.1% to 10.4%.
Above normal = worse
Weakens · Relationship strength 0.33 (weight 0.55 × strength 0.6)
Observed
7.97% of population aged 16 years or over · 5.2 above the normal line (2025)
Worse than normal8 readings, 2018–2025: rose from 7.77% of population aged 16 years or over to 7.97% of population aged 16 years or over.
Above normal = worse
Strengthens · Relationship strength 0.28 (weight 0.55 × strength 0.5)
Observed
91.6% of population · 8.4 below the normal line (2023)
Worse than normal4 readings, 2020–2023: rose from 90.4% of population to 91.6% of population.
Above normal = better
All indicators on this path (4)
- Better
Weakens · Relationship strength 0.26 (weight 0.55 × strength 0.48)
Observed
80 Years · 2.3 below the normal line (2023)
Worse than normal6 readings, 2018–2023: rose from 79.5 Years to 80 Years.
Above normal = better
Evidence
The sources behind this fact and its verification state.
- 1.FDR Library — Einstein letter neighbourhoodFranklin D. Roosevelt Presidential Library · High credibility · verified
- 2.Britannica — Einstein, patent officeEncyclopaedia Britannica · High credibility · verified
What the sources establish
Official locator: FDR Library — Einstein letter neighbourhood at https://www.fdrlibrary.org/ (opens in a new tab) (Franklin D. Roosevelt Presidential Library). Independent locator: Britannica — Einstein, atomic bomb letter at https://www.britannica.com/biography/Albert-Einstein (opens in a new tab) (Encyclopaedia Britannica). Official carrier: FDR Library — Einstein letter neighbourhood (https://www.fdrlibrary.org/ (opens in a new tab); Franklin D. Roosevelt Presidential Library). Independent carrier: Britannica — Einstein, atomic bomb letter (https://www.britannica.com/biography/Albert-Einstein (opens in a new tab); Encyclopaedia Britannica).
Established: a sourced public record of The Einstein-Szilárd letter of 2 August 1939 warns Roosevelt about fission as a dated weapons-advice file under 1939-08-02 for Albert Einstein. Established: a sourced public record of The Einstein-Szilárd letter of 2 August 1939 warns Roosevelt about fission as a dated weapons-advice file under 1939-08-02.
If a number is not in the two records named above, it is not supplied here.
Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.
Confidence is stated on the impact path, not hidden in adjectives. Manhattan Project execution is not this signature as unique lab direction. Mixed effects of The Einstein-Szilárd letter of 2 August 1939 warns Roosevelt about fission as a dated weapons-advice file are separate paths.
Causal path
How this event connects to drivers and indicators in the graph.
- ActorAlbert Einstein
- contributed toFactThe Einstein-Szilárd letter of 2 August 1939 warns Roosevelt about fission as a dated weapons-advice file
- weakensDriverEnergy Security
- strengthensIndicatorPoverty headcount ratio at $3.00 a day (2021 PPP) (% of population)
Cite this page
Factrail. (2026). The Einstein-Szilárd letter of 2 August 1939 warns Roosevelt about fission as a dated weapons-advice file. Factrail. https://factrail.ai/facts/ein-szilard-1939
https://factrail.ai/facts/ein-szilard-1939
Accessed 16 October 2026.
By the Factrail desk · Method: how we source and score · Last reviewed
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