Which has higher centralization of political power index, Iran or South Sudan?

South Sudan, at 0.847 against 0.834 in Iran as of 2025.

How many years of comparable data are there for Iran and South Sudan?

126 years are reported by both, from 1900 to 2025.

Where does this data come from?

V-Dem (2026) – processed by Our World in Data, published as Centralization of Political Power Index. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Iran vs South Sudan: Centralization of Political Power Index

Iran

0.834

in 2025

South Sudan

0.847

in 2025

Iran rank

29th

South Sudan rank

26th

Centralization of Political Power Index over time

Iran
South Sudan

How they compare

South Sudan currently reports 0.847 against 0.834 in Iran, a difference of 0.013.

The two have swapped places 13 times across 126 shared years of data; in 1900 it was Iran ahead.

Iran ranks 29th and South Sudan ranks 26th of 173 countries.

Across the 13 decades both report, Iran averaged higher in 9 and South Sudan in 4.

Head to head by decade

Decade	Iran	South Sudan	Difference	Ahead
1900s	0.9336	0.755	0.1786	Iran
1910s	0.9156	0.755	0.1606	Iran
1920s	0.8996	0.755	0.1446	Iran
1930s	0.8984	0.755	0.1434	Iran
1940s	0.8225	0.7654	0.0571	Iran
1950s	0.7851	0.6878	0.0973	Iran
1960s	0.8048	0.6893	0.1155	Iran
1970s	0.7911	0.7425	0.0486	Iran
1980s	0.768	0.7108	0.0572	Iran
1990s	0.7835	0.966	0.1825	South Sudan
2000s	0.7731	0.9141	0.141	South Sudan
2010s	0.7628	0.8513	0.0885	South Sudan
2020s	0.8177	0.8293	0.0117	South Sudan

Averages of every year both report within each decade.

Frequently asked questions

Which has higher centralization of political power index, Iran or South Sudan?: South Sudan, at 0.847 against 0.834 in Iran as of 2025.
What is the difference in centralization of political power index between Iran and South Sudan?: 0.013, with South Sudan ahead.
How many years of comparable data are there for Iran and South Sudan?: 126 years are reported by both, from 1900 to 2025.
How do Iran and South Sudan rank globally for centralization of political power index?: Iran ranks 29th and South Sudan ranks 26th of 173 countries.
Where does this data come from?: V-Dem (2026) – processed by Our World in Data, published as Centralization of Political Power Index. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Individual pages

About this data

Indicator: Centralization of Political Power Index
Source: V-Dem (2026) – processed by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 176 places, 29,802 data points, 1789–2025
Last refreshed: 07 August 2026

Central estimate of the extent to which the executive is unconstrained by the legislature, judiciary, electoral management body, and other oversight.