The 31 unhealthiest, unhappiest, poorest, and most unsafe countries on Earth

Every year, the Legatum Institute, a London-based think tank, releases its annual Prosperity Index. The index ranks 142 countries in terms of their so-called prosperity.

Prosperity may mostly be used to talk about money, but the Legatum Institute thinks there is more to it than that.

It takes into account 89 different variables, ranging from indicators like a country's unemployment rate to asking citizens about how much political freedom they feel they have.

The data is then broken down into eight subindexes - economy, entrepreneurship and opportunity, governance, education, health, safety and security, personal freedom, and social capital. Each one is given a score and the prosperity of countries is calculated.

You can already take a look at the 26 countries that the Prosperity Index rated as the most prosperous, or in other words, the happiest, wealthiest, and most crime-free places on earth, but now it's time to look at the countries at the other end of the list.

Many of the countries that feature toward the bottom end of the index have been hit hard by wars and outbreaks of disease. They are generally lacking in strong economies, governments, and education systems.

We've taken the bottom 31 countries from the Legatum Institute's index and ranked them in reverse order, where number one represents the "least prosperous" country.