The essays collected in this thesis consider the politics of time of different Brazilian fictions, poems and critical texts. These essays share the premise that modernism, post-modernism, contemporary and similar terms are used in Brazilian critical and historiographical debates not only to designate periods chronologically distinct in time, but also distinct ways of being in time. The discussion of some decisive moments in the post debates in Brazil tries to demonstrate this point, examining texts by Haroldo de Campos, Silviano Santiago and Idelber Avelar, among others. On the other hand, critical readings of works by Murilo Rubião, Renato Pompeu and Ferreira Gullar aim to question the contrasts drawn by these critics, considering temporalities that do not fit well into the categories they formulate. Attention to different practices of figuration, organization and escansion of time in the literary texts under consideration highlights the potential for the invention of other historicities by means of literary creation. Political, in this sense, is the possibility of intuiting or experiencing in literary texts new possibilities for one s own historical time. Focusing in texts published between the 1940s and the 1970s in Brazil, these essays look to reconsider usual periodizations of the modern, the post-modern and the contemporary in Brazilian critical debates. Instead of circumscribing a period pre, post or of transition between two moments, the thesis aims to build a threshold, a zone of proximity which fades the outlines of these historiographical frontiers.