The world is not an equal place, and some places are a lot more unequal than others.
A national political border can have incredible significance; an abstract line separating neighboring peoples, economies, even life expectancies. Using GDP per capita as an indicator (sourcing the most recent Central Intelligence Agency data), the wealth divide between these four pairs of countries is vast ... even though they geographically sit side by side.
Click on each country below to see the extent of the financial divide.
(I'll leave it to you to figure out why this is.)
Kuwait and Iraq
Difference in GDP per capita: $38,300