Scielo RSS http://socialsciences.scielo.org/rss.php?pid=1819-054520080001&lang=es vol. 4 num. SE lang. es http://socialsciences.scielo.org/img/en/fbpelogp.gif http://socialsciences.scielo.org http://socialsciences.scielo.org/scielo.php?script=sci_arttext&pid=S1819-05452008000100001&lng=es&nrm=iso&tlng=es The objective of this paper is to analyze the challenges and opportunities that countries in South America are facing with the growth in the worldwide market of liquefied natural gas (LNG). Likewise, it aims to analyze, from different perspectives, the progress and setbacks regarding the interconnection of gas networks and the integration and cooperation of energy in the Southern Cone. This work comprises of five chapters. After the introduction and presentation of the subject, the second chapter analyzes the vision of predominant regional integration in Latin-America, the importance of political and economic interests, and the relevance of energy in regional integration processes. The third chapter describes the regional energy situation, its position in the worldwide context, the energy matrix conformation and the progress achieved in the integration and interconnection of gas. Chapter four provides details about the market tendencies of LNG around the world and in Latin-America, but also it presents the challenges and opportunities that each region has in order to strengthen their energy security. To finalize, chapter five presents conclusions and recommendations http://socialsciences.scielo.org/scielo.php?script=sci_arttext&pid=S1819-05452008000100002&lng=es&nrm=iso&tlng=es The concept of nation is confusing due both to its polysemy and symbolic dimensions, which range from individual identities to collective beliefs. This paper discusses the relationships between State and Nation in Bolivia. It first outlines concepts regarding a model of nation-States based on the European experience. This model, and the ideology that comes with it, helps to understand the mishaps of the collective constructions known as nation-States. The analysis of State mottos around the World reveals a lot about prevailing ideologies. But this model is entering into a crisis, as the French debate about its collective identity shows. Those who want to manipulate the concepts to their political needs, manage to wake up the demons of nationalism and racism. In a global World where the death of the nation-State is regularly announced, the looks are increasingly aiming at Bolivia's politic experience. The achievement of a new social pact in Bolivia could be an example for Humanity http://socialsciences.scielo.org/scielo.php?script=sci_arttext&pid=S1819-05452008000100003&lng=es&nrm=iso&tlng=es Santa Cruz de la Sierra is Bolivia's economic hub and its most populated city; it is also one of Latin America's fastest growing urban areas, with more than 70 per cent of its population living above poverty level. Its modern architecture and broad avenues make home to approximately two million people, from very diverse backgrounds, who have built a very unique society in the heart of South America. This vibrant and ethnically diverse city was, only fifty years ago, an impoverished, isolated frontier town of approximately 40,000 inhabitants who carried, often unknowingly, the legacy of many of the city's founders, who were of Jewish origin. This article intends to unveil some facts of this interesting legacy, and encourage further research on the subject