What I try to do in this paper is to analyze and probe what Rosa Luxemburg and Antonio Gramsci understand by pessimism and optimism. Luxemburg and Gramsci demonstrate how liberal capitalist ideology uses “a false form of hope to keep people yoked to the system that oppresses them.” In this “terrible world” and under the current capitalist circumstances which lead to economic, social, political and ecological crises, it may be difficult to be optimistic about the future. Besides, not only the multiple crises but also the many defeats suffered by progressive movements in the different areas of struggles against ongoing economic and political regression bring along a depressive and desperate feeling that could also be called pessimism. The questions I am asking are very simple: What is pessimism and optimism for Luxemburg and Gramsci? For them, what sort of social conditions lead to pessimism or optimism? In this paper, I will try to demonstrate that both Rosa Luxemburg and Gramsci adopted a dialectical approach to pessimism and optimism, they were “pessoptimists” so to speak. Based upon what Hegel once said, “the negative is just as much positive”, I will explain this dialectical relationship by claiming that pessimism exists in optimism and vice versa. For this purpose, I will focus on some of Rosa Luxemburg’s texts in the recently published volumes on Revolution as well as in her letters. Furthermore, I will concentrate on some texts by Gramsci in which he makes particular reference to pessimism and optimism as symbolized by his famous “pessimism of the intelligence, optimism of the will” ; El propósito de este trabajo es analizar y explorar lo que Rosa Luxemburgo y Antonio Gramsci entienden por pesimismo y optimismo. Luxemburgo y Gramsci muestran cómo la ideología capitalista liberal utiliza “una falsa forma de esperanza para mantener a la gente sometida al sistema que la oprime”. En este “mundo terrible” y bajo las actuales circunstancias capitalistas que conducen a la crisis económica, social, política y ...