What are 10 characteristics of third world countries?

You don't say "third world" anymore. The current term is "Developing Country".

Main characteristics involve:

- High level of corruption in the government.

- More than 6 social classes (high social stratification).

- Less than US 500 monthly income per capita

- Human development index below 6 on a scale of 1 to 10.

- Alphabetism rate below 70%

- Not free education

- Poor sanitation