Unfortunately, there are 252 countries in the world, of which only 23 are highly developed. What is important for a country is, first of all, the economy, the amount of mineral resources and the population. There is one paradox: Nigeria has a huge amount of oil, but the people are very poor. This can be explained by the fact that Nigeria has a very high level of corruption, insufficient economic development and low levels of health care. And all these problems led to the development of fraud, robbery and violence.