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eventVerified

Caesar crosses the Rubicon in 49 BCE and opens civil war as later dated

In 49 BCE Caesar crossed the Rubicon and opened civil war as later dated. In the causal graph this event strengthens Political Polarization, a driver that weakens Having a say in government — a worsening welfare path.

Read the full account

In 49 BCE Caesar crossed the Rubicon and opened civil war as later dated. The proverb is colour. The crossing is the instrument. Julius Caesar's documented role is: He brought a legion into Italy against senatorial command. The alea-iacta saying is later colour.

Context

Pompey and the Senate are the counterparts. Sharing the war with the Thirteenth Legion is required. The setting of Caesar crosses the Rubicon in 49 BCE and opens civil war as later dated is the public file around -0049-01-01. Contribution type is direct. Driver political-polarization is attached because the significance names a mechanism from this act, not because a standing list needed coverage.

Shared responsibility is part of Caesar crosses the Rubicon in 49 BCE and opens civil war as later dated. Naming Julius Caesar does not delete co-authors, institutions, or later transmitters. The lag from -0049-01-01 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.

Why it matters

Worsening path from Caesar crosses the Rubicon in 49 BCE and opens civil war as later dated on -0049-01-01. Opening civil war is a polarisation path of high weight. The welfare reading on this path is worsening.

Who was responsible

Contribution type and responsibility level for each recorded actor — not sole-author shorthand.

  • Julius Caesar

    Person

    Direct responsibility

    responsibility level 0.64 · verified

    He brought a legion into Italy against senatorial command. The alea-iacta saying is later colour.

What changed

Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.

    1. FactCaesar crosses the Rubicon in 49 BCE and opens civil war as later dated
    2. strengthensDriverPolitical Polarization
    3. weakensIndicators (2)Having a say in government
    Worsening path

    impact weight 0.65 · Effect from 49 BCE · verified

    Opening civil war is a polarisation path of high weight.

    • Having a say in government

      via Political Polarization

      Worse

      Weakens · Relationship strength 0.29 (weight 0.65 × strength 0.45)

      Observed

      29.8% of population aged 16-65 years · 8.13 below the normal line (2023)

      Worse than normal

      Two readings: 30.2% of population aged 16-65 years (2021) and 29.8% of population aged 16-65 years (2023).

      20212023

      Above normal = better

    • Rule of Law Gap from the Highest Governance Score

      via Political Polarization

      Worse

      Strengthens · Relationship strength 0.29 (weight 0.65 × strength 0.45)

      Observed

      43.9 Score · 43.9 above the normal line (2024)

      Worse than normal

      26 readings, 1996–2024: rose from 43 Score to 43.9 Score.

      Normal is zero · any amount = worse

Evidence

The sources behind this fact and its verification state.

Verified2 sources on file
  1. 1.Britannica — RubiconEncyclopaedia Britannica · High credibility · verified
  2. 2.Britannica — Julius Caesar, pontifex maximusEncyclopaedia Britannica · High credibility · verified
What the sources establish

Official locator: Britannica — Rubicon at https://www.britannica.com/place/Rubicon (opens in a new tab) (Encyclopaedia Britannica). Independent locator: Britannica — Julius Caesar, civil war at https://www.britannica.com/biography/Julius-Caesar-Roman-ruler (opens in a new tab) (Encyclopaedia Britannica). Official carrier: Britannica — Rubicon (https://www.britannica.com/place/Rubicon (opens in a new tab); Encyclopaedia Britannica). Independent carrier: Britannica — Julius Caesar, civil war (https://www.britannica.com/biography/Julius-Caesar-Roman-ruler (opens in a new tab); Encyclopaedia Britannica).

Established: a sourced public record of Caesar crosses the Rubicon in 49 BCE and opens civil war as later dated under -0049-01-01 for Julius Caesar. Established: a sourced public record of Caesar crosses the Rubicon in 49 BCE and opens civil war as later dated under -0049-01-01.

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

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

Confidence is stated on the impact path, not hidden in adjectives. Year-level January 49. Mixed effects of Caesar crosses the Rubicon in 49 BCE and opens civil war as later dated are separate paths.

The contribution type is direct. That reading is an impact-path choice, not a property stored on the Fact itself.

Causal path

How this event connects to drivers and indicators in the graph.

  1. ActorJulius Caesar
  2. contributed toFactCaesar crosses the Rubicon in 49 BCE and opens civil war as later dated
  3. strengthensDriverPolitical Polarization
  4. weakensIndicatorHaving a say in government

Cite this page

Factrail. (2026). Caesar crosses the Rubicon in 49 BCE and opens civil war as later dated. Factrail. https://factrail.ai/facts/juc-rubicon-49

https://factrail.ai/facts/juc-rubicon-49

Accessed 16 October 2026.

By the Factrail desk · Method: how we source and score · Last reviewed

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