# The Einstein-Szilárd letter of 2 August 1939 warns Roosevelt about fission as a dated weapons-advice file

Date: 1939

## The fact

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. Shared offices, unnamed crews, printers, or later editors may appear without becoming this instrument.

The welfare reading used in this dossier is worsening. That reading is an impact-path choice, not a property stored on the Fact itself.

## Evidence and sources

Official locator: FDR Library — Einstein letter neighbourhood at https://www.fdrlibrary.org/ (Franklin D. Roosevelt Presidential Library). Independent locator: Britannica — Einstein, atomic bomb letter at https://www.britannica.com/biography/Albert-Einstein (Encyclopaedia Britannica). Official carrier: FDR Library — Einstein letter neighbourhood (https://www.fdrlibrary.org/; Franklin D. Roosevelt Presidential Library). Independent carrier: Britannica — Einstein, atomic bomb letter (https://www.britannica.com/biography/Albert-Einstein; Encyclopaedia Britannica).

Official or archival record: FDR Library — Einstein letter neighbourhood (https://www.fdrlibrary.org/; Franklin D. Roosevelt Presidential Library).

## Significance

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.

## What is established and what is not

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. Do not say he built the bomb. Do not drop Szilárd. 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.

## People

- Albert Einstein: https://factrail.ai/people/albert-einstein

## Drivers

- Energy Security: https://factrail.ai/drivers/energy-security

## Sources

- https://www.fdrlibrary.org/
- https://www.britannica.com/biography/Albert-Einstein

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/ein-szilard-1939