Can I just say that this story resonates with a lot of countries in the past. When countries focused on proper law and order, which control on inflation and making sure the economy was working effectively making the lives of normal people around them prosperous.
However once greed or should I say corruption seeped into the hearts of politicians it changed a lot of things. The middle east you're seeing right now was because of the Oil. Libya in 1990s and early 2000s was one of the best middle eastern countries to live in and prosper. This all changed when Gaddafi tried to trade the Oil in gold instead of the dollar, then he was assassinated.
This current venezuelan crisis could be a culmination of various hidden plots and conspiracies brought to fruition. Whenever there is Oil involved there will always come crisis and political instability, because it has always been the Black Gold.
Not necessarily, in Norway there is a lot of oil and the result is that Norway has the biggest investment fund in the world. Oil can be used to improve countries, what is needed is responsible people.