Geography

Definition: Improvement in factors that determine overall quality of life.
Economic Development: Wealth and income generation.
Social Development: Health services, life expectancy, and education.
Political Development: Freedom of speech, democracy, and governance quality.
Environmental Development: Sustainable resource management for long-term progress.

GDP per Capita (Gross Domestic Product):
- Total value of goods and services produced within a country in a year divided by its population.
- Enables valid comparisons between countries with different population sizes.
GNI per Capita (Gross National Income):
- Total domestic output plus wealth generated by importation and exporting by domestic corporations (minus debts).
Purchasing Power Parity (PPP):
- Adjusts GNI figures to account for variations in cost of living between countries (e.g., $1$ USD buys more in India than in the US).

HDI (Human Development Index):
- UN composite measure combining Life Expectancy, Education, and Income per capita.
- Excludes environmental considerations; scores range from $0$ to $1$ .
- Groups countries into four tiers (Very High, High, Medium, Low).

Gini Coefficient:
- Measures income distribution inequality within a nation from $0$ (perfect equality) to $1$ (perfect inequality).
- Low values indicate equal income distribution (e.g., European countries); high values indicate unequal distribution (e.g., Southern Africa).
Corruption Perceptions Index (CPI):
- Ranks public sector corruption from $0$ (Highly Corrupt) to $100$ (Very Clean).
- Ranks countries from cleanest (e.g., Denmark, New Zealand) to most corrupt (e.g., Somalia, North Korea).