Explique por que a Venezuela, que tem as maiores reservas de petróleo do mundo, encontra-se desde o inicio do seculo em uma grave crise econômica e social.

The main reason for Venezuela's economic and social problems has been the communist type of government and isolationism.

Explanation:

Venezuela is a country located in the northern part of South America. Generally speaking, the country is in a location from which it can benefit a lot, with good climate, good soil, lot of touristic potentials, access to the sea, big economies nearby, and most importantly it has the largest reserves of the most demanded resource - oil.

Venezuela though struggles ever since it has become a secular state. The primary reason is politics, with communist leaders running the country, closing in the economy and running it in a terrible manner, while in meantime creating tensions with very powerful countries. The country has been isolated, with a handful of friendly countries around the world, none of which is nearby except for Cuba. The opponents of Venezuela have found it very easy to sanction and block it, badly injuring its economy, and the terrible economic conditions have led to social unrest and violence.