Why are refugee camps common in many African countries today?

Militaries form camps to train people to cause instability.
Governments and international organizations create camps to assist people affected by instability.
Colonialists open camps to imprison people who cause instability.
Citizens establish camps as foundations for new countries that will be free from instability.

organizations create camps to assist people affected by instability.

when a country suffers, for example, a drought period, the market product is affected for a low offer, in this case, potatoes; the government has to tax to the households, which have to give more money for the potatoes which they consume, that situation make them consume substitute goods even through loans, it could increase the financial market movement and the inflationary phenomena, the business has to increase salaries in order to the employees could buy a more expensive food (potatoes) and in order to inflation tha business had to buy expensive supplies in the factor market, while the rest of the world have to gain more money to consume the same amount of potatoes.