%0 Journal Article %T La fundamentaci¨®n del saber hist¨®rico en el siglo XX: investigaci¨®n social, metodolog¨ªa y racionalidad operativa %A Betancourt Mart¨ªnez %A Fernando %J Estudios de historia moderna y contempor¨¢nea de M¨¦xico %D 2010 %I Instituto de Investigaciones Hist¨®ricas, UNAM %X this article seeks to demonstrate the transformation of the historical discipline throughout the 20th century. this process affected two aspects of historical knowledge: it introduces a loss of theoretical centrality that previously defined its cognitive nature and produced a diversity of research styles and modalities, which led to a reconversion of its methodological order. the author's thesis considers that this transformation can be explained by exploring the complex relationship history established with the field of social research. %K historiography %K theory of history %K methodology %K social sciences %K philosophy of history %K epistemology. %U http://www.scielo.org.mx/scielo.php?script=sci_abstract&pid=S0185-26202010000200004&lng=en&nrm=iso&tlng=en