Social factors – some parts of the world have issues that are caused by people. These include low levels of education, poor water quality or a lack of doctors.
Where countries suffer from conflict or civil war, they are unable to keep the economy working and spend extra finance on weapons (Syria).
Famine can lead to malnutrition and a reduced capacity to work and create income (Ethiopia).
Countries which have accumulated large debts have to repay loans and interest causing less money for services.
Corruption in the government (Nigeria) can lead to money being used inappropriately
Countries with fertilesoils and a suitable climate can grow cash crops which can be sold for income (Kenya: Coffee).
Some countries have natural resources such as oil, which can be sold to generate foreign currency. E.g. Saudi Arabia.
Countries with a poor education system have many low skilled workers and are unable to attract foreign investment.
Some countries (Chad) are landlocked and find it more expensive to export and import goods as shipping is not an option.