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Human Development Index

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The Human Development Index, or HDI, is a statistical tool used to rank countries.

human-development-index,World,2023 (cropped)
human-development-index,World,2023 (cropped)

It measures human development through a composite index. This means it combines different types of data into one score. The index focuses on people rather than just national wealth. It helps us see how well people can live and thrive. This measurement is important for understanding global progress.

Human Development Index Underlying Principles
Human Development Index Underlying Principles

The HDI is built on the human development approach. This idea was shaped by economist Mahbub ul-Haq. It also uses the work of Amartya Sen on human capabilities. The index asks if people can "be" and "do" desirable things. "Being" includes being healthy, well-fed, and sheltered. "Doing" includes working, voting, and participating in community life. Freedom of choice is a central part of this idea. For example, fasting for religion is a choice. Being hungry because of a famine is not a choice.

Human Development Index Underlying Principles
Human Development Index Underlying Principles

To calculate the score, the index uses three main dimensions.

Human Development Index regions evolution 1990-2021-fr
Human Development Index regions evolution 1990-2021-fr

The first dimension is a long and healthy life. This is measured by life expectancy at birth. The second dimension is education. This includes mean years of schooling for adults. It also includes expected years of schooling for children. The third dimension is a decent standard of living. This is measured by Gross National Income (GNI) per capita. This income is measured using purchasing power parity (PPP).

Human Development Index trends
Human Development Index trends

The calculation method changed in 2010. The current method uses three specific indices. The Life Expectancy Index (LEI) scales from 0 to 1. A score of 1 equals 85 years of life. A score of 0 equals 20 years of life. The Education Index (EI) has two parts. The Mean Years of Schooling Index (MYSI) looks at adults aged 25 and older. The Expected Years of Schooling Index (EYSI) looks at children. The EYSI is capped at 18 years of school. This is roughly the time needed for a master's degree. The Income Index (II) scales from 0 to 1. A score of 1 is $75,000 GNI per capita. A score of 0 is $100 GNI per capita.

HDI2023Incrimental2
HDI2023Incrimental2

The history of the HDI began in 1990. Mahbub ul-Haq launched the first Human Development Reports. He worked with the United Nations Development Programme (UNDP). His goal was to shift focus toward people-centered policies. He wanted to move away from simple national income accounting. He believed leaders should value human well-being. Since then, the reports have been published annually. The 2025 report used data collected in 2023. In 2023, many countries had "very high human development."

HDI2023Incrimental2
HDI2023Incrimental2

Specific countries have often led the rankings. Norway has been ranked highest sixteen times. Canada has held the top spot eight times. Iceland has been first three times. Switzerland and Japan have each been first twice. The index can show different levels of growth.

Average annual HDI growth from 2010 to 2023 published in 2025
Average annual HDI growth from 2010 to 2023 published in 2025

Some countries show high growth over many years. Others may have very high scores but slow growth. The index helps identify these different patterns. It provides a way to compare nations globally.

human-development-index,World,2023 (cropped)
human-development-index,World,2023 (cropped)

There are criticisms of the HDI method. Some experts say it ignores environmental sustainability. Others say it does not focus on unemployment or democracy. The index also does not measure net wealth per capita. This can lower the rank of G7 members. Some say removing adult literacy changed the focus too much. It now measures quantity of education rather than quality. Researchers Wolff, Chong, and Auffhammer found errors in data. They suggested 34% of countries might be misclassified. This is due to formula revisions and thresholds.

Per-capita-co-emissions-vs-human-development-index
Per-capita-co-emissions-vs-human-development-index

To address these issues, the UNDP created the IHDI. This is the inequality-adjusted Human Development Index. It was introduced in the 2010 report. The HDI shows "potential" human development. This is the maximum score if there were no inequality. The IHDI shows the "actual" level of development. It accounts for how resources are shared. This helps show the real situation for most people. The index continues to evolve to better reflect the world.

Per-capita-co-emissions-vs-human-development-index
Per-capita-co-emissions-vs-human-development-index
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File:HDI2023Incrimental2.svg
HDI2023Incrimental2.svg
File:Human Development Index Underlying Principles.svg
Human Development Index Underlying Principles.svg
File:Human Development Index regions evolution 1990-2021-fr.svg
Human Development Index regions evolution...
File:Human Development Index trends.svg
Human Development Index trends.svg
File:Average annual HDI growth from 2010 to 2023 published in 2025.svg
Average annual HDI growth from 2010 to...
File:human-development-index,World,2023 (cropped).svg
human-development-index,World,2023 (cropped).svg
File:Per-capita-co-emissions-vs-human-development-index.svg
Per-capita-co-emissions-vs-human-developme...
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