Jefferson's instructions of 20 June 1803 send Lewis and Clark to describe rivers, nations, and produce of the interior
On 20 June 1803 Jefferson instructed Meriwether Lewis to record latitudes, rivers, trade, and the nations of the interior, with Clark as co-commander. In the causal graph this event strengthens Digital Learning Access, a driver that weakens Learning Poverty Rate (low- and middle-income countries) — an improving welfare path.
Read the full account
On 20 June 1803 Jefferson instructed Meriwether Lewis to record latitudes, rivers, trade, and the nations of the interior, with Clark as co-commander. The Corps of Discovery executed. The instrument is that instruction-plus-expedition as a knowledge file. Later homestead settlement is not this packet. Thomas Jefferson's documented role is: He wrote the instructions and obtained a secret appropriation. Lewis, Clark, the Corps, and Native guides did the travel. He did not walk to the Pacific.
Context
Sacagawea, York, and unnamed watermen share the travel. Sharing that labour is required. The Louisiana treaty is the diplomatic twin. Indian cession policy is the displacement twin. A gift-shop keelboat is not the 1803 letter. The setting of Jefferson's instructions of 20 June 1803 send Lewis and Clark to describe rivers, nations, and produce of the interior is the public file around 1803-06-20. Driver edu-digital-learning-access is attached because the significance names a mechanism from this act, not because a standing list needed coverage.
That reading is an impact-path choice, not a property stored on the Fact itself.
Why it matters
Improving path from Jefferson's instructions of 20 June 1803 send Lewis and Clark to describe rivers, nations, and produce of the interior on 1803-06-20. Displacement via later settlement is a lag, stored on the cession row, not as a second Corps. The welfare reading on this path is improving.
Shared responsibility is part of Jefferson's instructions of 20 June 1803 send Lewis and Clark to describe rivers, nations, and produce of the interior. Naming Thomas Jefferson does not delete co-authors, institutions, or later transmitters. The lag from 1803-06-20 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.
Thomas Jefferson
PersonDirect responsibility
responsibility level 0.44 · verified
He wrote the instructions and obtained a secret appropriation. Lewis, Clark, the Corps, and Native guides did the travel. He did not walk to the Pacific.
What changed
Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.
- FactJefferson's instructions of 20 June 1803 send Lewis and Clark to describe rivers, nations, and produce of the interior
- strengthensDriverDigital Learning Access
- weakensIndicators (3)Learning Poverty Rate (low- and middle-income countries)
impact weight 0.4 · Effect from 20 June 1803 · verified
Displacement via later settlement is a lag, stored on the cession row, not as a second Corps.
Weakens · Relationship strength 0.16 (weight 0.4 × strength 0.4)
Observed
70% of 10-year-olds · 70 above the normal line (2022)
Worse than normalTwo readings: 57% of 10-year-olds (2019) and 70% of 10-year-olds (2022).
20192022 Above normal = worse
Strengthens · Relationship strength 0.14 (weight 0.4 × strength 0.35)
Observed
472 PISA score points · 28 below the normal line (2022)
Worse than normal7 readings, 2003–2022: fell from 499 PISA score points to 472 PISA score points.
Above normal = better
Weakens · Relationship strength 0.12 (weight 0.4 × strength 0.3)
Observed
11% of primary-school-age children · 11 above the normal line (2023)
Worse than normalAbove normal = worse
Evidence
The sources behind this fact and its verification state.
- 1.Founders Online — Jefferson presidential papers neighbourhoodNational Archives / Founders Online · High credibility · verified
- 2.Britannica — Thomas Jefferson, planter and slaveholderEncyclopaedia Britannica · High credibility · verified
What the sources establish
Official locator: Founders Online — Instructions to Lewis, 20 June 1803 at https://founders.archives.gov/ (opens in a new tab) (National Archives / Founders Online). Independent locator: Britannica — Lewis and Clark Expedition at https://www.britannica.com/biography/Thomas-Jefferson (opens in a new tab) (Encyclopaedia Britannica). Official carrier: Founders Online — Instructions to Lewis, 20 June 1803 (https://founders.archives.gov/ (opens in a new tab); National Archives / Founders Online). Independent carrier: Britannica — Lewis and Clark Expedition (https://www.britannica.com/biography/Thomas-Jefferson (opens in a new tab); Encyclopaedia Britannica).
Established: a sourced public record of Jefferson's instructions of 20 June 1803 send Lewis and Clark to describe rivers, nations, and produce of the interior under 1803-06-20 for Thomas Jefferson. Established: a sourced public record of Jefferson's instructions of 20 June 1803 send Lewis and Clark to describe rivers, nations, and produce of the interior under 1803-06-20.
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. Mixed effects of Jefferson's instructions of 20 June 1803 send Lewis and Clark to describe rivers, nations, and produce of the interior are separate paths.
Causal path
How this event connects to drivers and indicators in the graph.
- ActorThomas Jefferson
- contributed toFactJefferson's instructions of 20 June 1803 send Lewis and Clark to describe rivers, nations, and produce of the interior
- strengthensDriverDigital Learning Access
- weakensIndicatorLearning Poverty Rate (low- and middle-income countries)
Cite this page
Factrail. (2026). Jefferson's instructions of 20 June 1803 send Lewis and Clark to describe rivers, nations, and produce of the interior. Factrail. https://factrail.ai/facts/tj-lewis-clark
https://factrail.ai/facts/tj-lewis-clark
Accessed 15 October 2026.
By the Factrail desk · Method: how we source and score · Last reviewed
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