The MIT license in LICENSE applies to the contentiousR software and
documentation written for this package. It does not relicense the third-party
research data distributed in inst/extdata.

The following data have explicit open licenses at their source:

* gdp_gapminder_v32.csv.xz: Gapminder, Creative Commons Attribution 4.0.
  https://www.gapminder.org/free-material/
* UcdpPrioConflict_v26_1.csv.xz and UCDP_VPP_Dataset_v26_1.xlsx: Uppsala
  Conflict Data Program, Creative Commons Attribution 4.0.
  https://ucdp.uu.se/downloads/
* NAVCO_2.1.RData: NAVCO 2.1, CC0 1.0.
  https://doi.org/10.7910/DVN/MHOXDV
* MEC.rds: Major Episodes of Contention, CC0 1.0.
  https://doi.org/10.7910/DVN/JQWQNW
* un_population.RData: UN World Population Prospects 2024, Creative Commons
  Attribution 3.0 IGO. https://population.un.org/wpp/
* mmad_events.csv.xz: Mass Mobilization in Autocracies Database, Creative
  Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC
  BY-NC-SA 4.0) -- NOT the MIT terms this package's own code is under.
  Redistribution requires attribution, is non-commercial only, and any
  redistributed copy (including as part of this package) must remain under
  the same CC BY-NC-SA 4.0 terms. https://mmadatabase.org/use/

The remaining third-party data retain the copyrights and terms specified by
their creators. Their inclusion here does not grant rights beyond those terms:

* NAVCO_1.3.RData: Nonviolent and Violent Campaigns and Outcomes project.
* SCAD2018Africa_Final.csv.xz and SCAD2018LatinAmerica_Final.csv.xz: Social Conflict
  Analysis Database, Robert S. Strauss Center for International Security and
  Law.
* mmALL_073120.RData: Mass Mobilization Data Project.
* revolutionary_episodes_beissinger.csv.xz: Mark R. Beissinger, Revolutionary
  Episodes Dataset.
* revolutionary_episodes_csra.csv.xz: Ustyuzhanin, Semichev, Grinin, and
  Korotaev, Revolutionary Database (2000-2024), V1.102, Centre for Stability
  and Risk Analysis, HSE University.
* archigos_4.1.txt.xz: Henk E. Goemans, Kristian Skrede Gleditsch, and Giacomo
  Chiozza, Archigos 4.1.
* reign_leader_list.csv.xz: REIGN Dataset.
* NMC-70-abridged.rds: Correlates of War Project, National Material
  Capabilities v7.0.
* fariss_gdp.rds, fariss_gdppc.rds, and fariss_pop.rds: Fariss, Anders,
  Markowitz, and Barnum (2022), historic GDP and population estimates.
* SIPRI-Milex-data-1949-2025_v1.2.xlsx: Stockholm International Peace
  Research Institute, Military Expenditure Database. Free to use with
  attribution; commercial use requires separately negotiating a royalty
  with SIPRI. https://www.sipri.org/about/terms-and-conditions
* estimates_milburden_20250429.rds and estimates_milex_con_20250429.rds:
  Barnum, Fariss, Markowitz, and Morales (2025), Global Military Spending
  Dataset.

To keep the package small, some files are stored recompressed or in a
different file format (e.g. Stata .dta saved as .rds), and the Mass
Mobilization, SCAD, and Gapminder files contain only the columns the package
reads; no values have been altered.

See the data-sources vignette for source URLs, versions, and citations. Anyone
redistributing the package is responsible for verifying that the applicable
third-party terms permit redistribution.