The 22 unhealthiest, unhappiest, poorest, and most unsafe countries on earth

The Legatum Institute, a London based

think-tank released its annual Prosperity Index this week. The index is a massive survey which ranks 142 countries in terms of their so called "prosperity".

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

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

The data is then broken down into eight sub indexes - 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.

We've already shown you 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 its time to look at the countries at the other end of the list.

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

We've taken the bottom 22 countries from the Legatum Institute's, and ranked them in reverse order. So check out the world's 22 least prosperous countries.