Tesla becomes a naturalised citizen of the United States
On 30 July 1891 Tesla, aged 35, became a naturalised citizen of the United States. In the causal graph this event strengthens Democratic Resilience, a driver that strengthens Having a say in government — an improving welfare path.
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On 30 July 1891 Tesla, aged 35, became a naturalised citizen of the United States. It is a civic instrument, not a motor.
Context
He had immigrated in 1884. Citizenship is stored because later U.S. patent, medal and wartime-paper files treat him as an American inventor-engineer. It is not a claim that naturalisation caused Niagara.
Nikola Tesla is not the sole author of every later object, law, or museum label that uses the name. Shared work with courts, excavators, printers, spouses, officials, and later states does not erase a documented role, and it does not make an ancient person the signer of a twentieth-century statute.
Why it matters
Civic-membership path. High confidence on the year; low on public-welfare weight.
A certificate is not a generating station. Keep the weight low.
Who was responsible
Contribution type and responsibility level for each recorded actor — not sole-author shorthand.
Nikola Tesla
PersonDirect responsibility
responsibility level 0.7 · verified
He applied and took the oath. The United States issued the certificate; he did not write nationality law.
What changed
Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.
- FactTesla becomes a naturalised citizen of the United States
- strengthensDriverDemocratic Resilience
- strengthensIndicators (3)Having a say in government
impact weight 0.55 · Effect from 30 July 1891 · verified
Strengthens · Relationship strength 0.39 (weight 0.55 × strength 0.7)
Observed
29.8% of population aged 16-65 years · 8.13 below the normal line (2023)
Worse than normalTwo readings: 30.2% of population aged 16-65 years (2021) and 29.8% of population aged 16-65 years (2023).
20212023 Above normal = better
Strengthens · Relationship strength 0.25 (weight 0.55 × strength 0.45)
Observed
0.53 score from 0 to 1 · 0.34 below the normal line (2024)
Worse than normal125 readings, 1900–2024: rose from 0.17 score from 0 to 1 to 0.53 score from 0 to 1.
Above normal = better
Strengthens · Relationship strength 0.25 (weight 0.55 × strength 0.45)
Observed
0.55 index score (0-1) · 0.26 below the normal line (2024)
Worse than normalAbove normal = better
Evidence
The sources behind this fact and its verification state.
- 1.Britannica — Nikola TeslaEncyclopaedia Britannica · High credibility · verified
- 2.Engineering and Technology History Wiki — Nikola TeslaIEEE / ETHW · High credibility · verified
What the sources establish
Britannica and ETHW independently record 1891 citizenship.
Britannica’s biography and IEEE/ETHW independently date U.S. citizenship to 1891.
Established: U.S. naturalisation in 1891. Not established: that citizenship invented polyphase current, or that it cancelled later hotel-bill poverty.
Causal path
How this event connects to drivers and indicators in the graph.
- ActorNikola Tesla
- contributed toFactTesla becomes a naturalised citizen of the United States
- strengthensDriverDemocratic Resilience
- strengthensIndicatorHaving a say in government
Cite this page
Factrail. (2026). Tesla becomes a naturalised citizen of the United States. Factrail. https://factrail.ai/facts/us-tesla-citizenship-1891
https://factrail.ai/facts/us-tesla-citizenship-1891
Accessed 16 October 2026.
By the Factrail desk · Method: how we source and score · Last reviewed
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