Today we started talking about why borders cause problems. The first step in knowing why they cause problems is to know the five basic shapes of states: Compact, Prorupted, Fragmented, Elongated, and Perforated. Here is another link to info on them. Another type of country border type is called landlocked borders. If a country has a landlocked border it must rely on others in order to trade on the world market. This article talks a little bit about landlocked borders and why they tend to be lower on the economic scale.