# Newton's Mint report leads to a proclamation fixing the guinea at 21 shillings

Date: 1717

## The fact

In 1717 Newton's Mint advice on the gold-silver ratio was followed by a proclamation valuing the guinea at 21 shillings. It is a dated monetary instrument, not a later gold-standard statute. Isaac Newton's documented role is: He reported as Master on gold-silver ratios. The Crown proclaimed; markets and later gold-standard stories are not this report.

## Context

Gold was overvalued relative to silver. Coin flows followed. Sharing the proclamation with the Crown is required. [Locke](/people/john-locke)'s earlier silver writings are a different decade. The setting of Newton's Mint report leads to a proclamation fixing the guinea at 21 shillings is the public file around 1717-12-22. Shared offices, unnamed crews, printers, or later editors may appear without becoming this instrument. Driver [fiscal-policy-sustainability](/drivers/fiscal-policy-sustainability) is attached because the significance names a mechanism from this act, not because a standing list needed coverage.

If a number is not in the two records named above, it is not supplied here.

## Evidence and sources

Royal Mint Museum and Britannica independently describe the 1717 guinea valuation. Official carrier: Royal Mint Museum — Newton, the guinea, and 1717 (https://www.royalmintmuseum.org.uk/; Royal Mint Museum). Independent carrier: Britannica — Newton at the Mint, gold and silver (https://www.britannica.com/biography/Isaac-Newton; Encyclopaedia Britannica).

Official or archival record: Royal Mint Museum — Newton, the guinea, and 1717 (https://www.royalmintmuseum.org.uk/; Royal Mint Museum).

## Significance

Worsening or mixed fiscal-price path stored here as cost: a completed official ratio that moved coin. Complex. High confidence on the proclamation; medium on later standard myths. The welfare reading on this path is worsening.

Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.

## What is established and what is not

Established: the 1717 guinea valuation followed Newton's Mint report. Not established: that he authored nineteenth-century gold-standard law. Established: a sourced public record of Newton's Mint report leads to a proclamation fixing the guinea at 21 shillings under 1717-12-22.

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

Confidence is stated on the impact path, not hidden in adjectives. Do not treat 1717 as the nineteenth-century gold standard. Mixed effects of Newton's Mint report leads to a proclamation fixing the guinea at 21 shillings are separate paths.

Shared responsibility is part of Newton's Mint report leads to a proclamation fixing the guinea at 21 shillings. Naming Isaac Newton does not delete co-authors, institutions, or later transmitters. The lag from 1717-12-22 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.

## People

- Isaac Newton: https://factrail.ai/people/isaac-newton

## Drivers

- Fiscal-Policy Sustainability: https://factrail.ai/drivers/fiscal-policy-sustainability

## Sources

- https://www.britannica.com/biography/Isaac-Newton
- https://www.royalmintmuseum.org.uk/

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/newton-guinea-1717