I would define petrolist states as states that are both dependent on oil production for the bulk of their exports or gross domestic product and have weak state institutions or outright authoritarian governments. High on my list of petrolist states would be Azerbaijan, Angola, Chad, Egypt, Equatorial Guinea, Iran, Kazakhstan, Nigeria, Russia, Saudi Arabia, Sudan, Uzbekistan and Venezuela.

To be sure, professional economists have, for a long time, pointed out in general the negative economic and political impacts that an abundance of natural resources can have on a country. This phenomenon has been variously diagnosed as "Dutch Disease" or the "resource curse." Dutch Disease refers to the process of deindustrialization that can result from a sudden natural resource windfall. The term was coined in the Netherlands in the 1960s, after it discovered huge deposits of natural gas.

What happens in countries with Dutch Disease is that the value of their currency rises, thanks to the sudden influx of cash from oil, gold, gas, diamonds or some other natural resource discovery. That then makes the country's manufactured exports uncompetitive and its imports very cheap. The citizens, flush with cash, start importing like crazy, the domestic industrial sector gets wiped out and, presto, you have deindustrialization.

Beyond these general theories, some political scientists have explored how an abundance of oil wealth, in particular, can reverse or erode democratizing trends. One of the most trenchant analyses that I have come across is the work of UCLA political scientist Michael L. Ross.

Using a statistical analysis from 113 states between 1971 and 1997, Ross concluded that a state's "reliance on either oil or mineral exports tends to make it less democratic; that this effect is not caused by other types of primary exports; that it is not limited to the Arabian Peninsula, to the Middle East, or sub-Saharan Africa; and that it is not limited to small states."

First, Ross argues, there is the "taxation effect." Oil-rich governments tend to use their revenues to "relieve social pressures that might otherwise lead to demands for greater accountability" from, or representation in, the governing authority. Oil-backed regimes that do not have to tax their people in order to survive also do not have to listen to their people or represent their wishes.