Scielo RSS http://socialsciences.scielo.org/rss.php?pid=0327-771220070002&lang=es vol. 3 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=S0327-77122007000200001&lng=es&nrm=iso&tlng=es The Residence Law, passed in 1902, and the Social Defense Law of 1910 allowed for many years the deportation of hundreds of foreign anarchists and unionists, resulting in a great diversity of penalties and bans. The parliamentary debates in those years, viewed through the parliamentary record of proceedings, allows access to a universe of representations that the ruling class had on the anarchists and consequently on social conflict. http://socialsciences.scielo.org/scielo.php?script=sci_arttext&pid=S0327-77122007000200002&lng=es&nrm=iso&tlng=es This article deals with the problem of development based on the production of natural resources which in recent years has increased substantially in Latin America. This is a trend which includes de case of Argentina where large petroleum, mining and agribusiness corporations have become some of the main economic actors of the country. What are the consequences of this type of "development" when the main objetives of these corporations is to exploit these natural resources which on the whole were preserved in our countries of the "periphery" while they were depredated in the countries of the "centre"? More then 80% of the natural resources available at present in the world for the future of humanity are localized in territories pertaining to peasant and indigenous communities and, in large measure, in Latin America. In this paper several case studies are considered: the expansion of mining, forestry related to the paper pulp industry and agribusiness. The condiciones in which these activities are expanded and the resistances and disputes developed by the populations that tend for the care of nature and the environment are considered. Finally, some reflexiones in which a critique of the concept of development based on techno-science and the activities of these large corporations as some of their fundamental supports is presented.