This article presents a series of considerations, founded on Itamar Even-Zohar’s theory of polysystemic culture, regarding the delimitation of Literary History’s object of study. My purpose is to analyze organically the four principal challenges of dynamic functionalism and the systemic model in their application to diachronic history. These challenges are as follows: 1) to understand polysystemic, extrasystemic and subsystemic interactions as well as the borders between systemic cultures as an alternative to traditional comparative methodology; 2) to incorporate as objects of study not only products/texts but also what Pierre Bourdieu’s theory of social fields describes as “espace des possibles”; 3) to test a sequential model capable of elucidating dynamic polychronics and systemic changes; and 4) to configure a critical selection of data that is susceptible to historicization and put it into dialogue with other concurrent historiographic models.