Underdeveloped countries, such as many in Africa like Mali, Somalia, and Democratic Republic of the Congo are characterized by many things: literacy rate, life expectancy, infant mortality rate, GDP, population, and other things. An underdeveloped country will have more teenagers than adults and life expectancies can only be up to thirty in some areas due to the lack of medicines and technology. The literacy rate can be 2%. Infant mortality is extremely high, which means many babies for due to the unhealthiness of the country. Population can vary. In an underdeveloped country, it can be normal for teens at age fourteen to have babies. This can result in a high population, but there is also the diseases, which kill many. That can lower the population significantly.
Many times people live on the streets and our poor would be considered their rich. Little if any access to clean water. Disease runs rampant. As many as 10-15 people per household. Limited electricity.
These are countries that are not able to sustain their citizen without the help of the fully established nations. They are normally poor due to lack of economical resources that can enable them earn more through industrialization and exportation of natural resources and finished products.
In poor South American countries there are few paved roads, few people own cars, stray dogs everywhere, people live in houses that are about to fall over. Been there, seen it in person. Mexico, Honduras, Belize.
Greed. Power. Political authority. Leads to destruction due to graft and corruption. These are one of the basics on why underdeveloped countries are still underdeveloped.On why they turn to WB-IMF for monetary assistance. On why they waste money on building military arms. At least, to majority of them. History had spoken and still it speaks.