Can we consider Plutarch's Parallel Lives a historical work? Can we read them as a unitary series? These are the initial questions that this thesis poses and that are investigated in the Introduction, five main Chapters, and the Conclusion. In the Introduction, a preliminary status quaestionis about ancient biography is presented before clarifying the methodology adopted for reading the Parallel Lives as a unitary historical work and the reasons for choosing the Lives of Lycurgus, Lysander, and Agesilaus as the case studies to examine in detail. Chapter 1 discusses the historiographical principles that emerge from the De sera numinis vindicta: for Plutarch history is primarily the history of individuals and cities, based on the interpretation of historical events. Chapter 2 tries to verify the hypothesis that the Parallel Lives correspond to the historical project delineated in the De sera numinis vindicta. This Chapter, moreover, reassesses the literary form of the Parallel Lives by employing the concepts of 'open macrotext' and 'cross-complementarity' between the Lives. Chapter 3 analyses the Life of Lycurgus, focusing on the formation of the cultural identity and the political model of Sparta. In the Life of Lycurgus, Plutarch indicates already the intrinsic weaknesses of Sparta and the probable causes of Spartan decline in the fourth century BC. Chapter 4 is devoted to the Life of Lysander, where Plutarch narrates how after the Peloponnesian War Sparta established its hegemony over the Greeks and, simultaneously, began its rapid moral and political decline into decadence. Plutarch also seems to suggest that in this historical period of extraordinary changes not only Sparta and Lysander but all the Greeks were guilty of distorting moral values. Chapter 5 concentrates on Agesilaus, who could have led Sparta and the Greeks to great success against the Persians, but, instead, had to save Sparta from complete destruction after the Battle of Leuctra. The Conclusion recapitulates the main points of the thesis and proposes possible arguments for future research on Plutarch’s Parallel Lives.

Après la Seconde Guerre mondiale, la littérature de science-fiction s’est développée en France sous la forme d’un sous-champ isolé au sein du champ littéraire, avec ses collections, ses critiques et ses lecteurs spécifiques. Cette littérature produit des univers fictionnels en tension entre la réalité conventionnelle et des états alternatifs de cette réalité, selon une modalité dénommée dans la thèse le « régime ontologique matérialiste spéculatif ». Le corpus des romans a été analysé d’abord dans une perspective diachronique, en présentant une histoire des acteurs, des structures éditoriales et des thèmes de la science-fiction en France, articulée à une réflexion sur les conditions et les perspectives d’écriture des auteurs français. Les romans ont ensuite été analysés de manière à permettre une théorisation à plusieurs niveaux de l’écriture de la science-fiction : le mot et le texte de science-fiction, les mondes fictionnels extrapolés à partir du monde réel et enfin la mémoire collective mise en place par l’ensemble des œuvres, que nous nommons le « macrotexte » de la science-fiction. Notre contribution principale à l’histoire littéraire est l’étude de la manière dont évoluent les représentations communes en science-fiction, sous la forme de paradigmes dominants successifs où les écrivains réinterprètent les images et idées de la science-fiction. Nous avons établi selon quelles modalités le corpus des romans de science-fiction fournit à l’analyse du discours narratif, à la théorie de la fiction et à l’étude de l’intertextualité, des exemples remarquables en raison des dispositifs destinés à mettre les univers de science-fiction en concurrence avec la réalité. / After the Second World War in France, science fiction literature took the form of an isolated subaltern field within the literary field, featuring specific publishing series, critics and readership. In science fiction novels, fictional worlds are created by mixing conventional reality and alternate states of reality, a process I call “régime ontologique matérialiste spéculatif” (“speculative materialistic ontological status”). I have studied French science fiction novels first from a historical perspective, by describing the protagonists, the publishers and the themes of French science fiction, as well as by assessing how and to what end French science fiction writers wrote their novels. I have then studied these novels at several levels: how words and texts are shaped in science fiction, how fictional worlds are extrapolated from the real world and how science fiction texts generate a collective memory, which I call the “macrotext” of science fiction. Our thesis contributes to literary history by studying how the perception of science fiction gradually changes over time, each main paradigm morphing into a new one as writers adapt science fiction images and ideas to their needs. I have also pointed out how science fiction novels may prove of a keen interest to narrative discourse analysis, fiction theory and intertextuality approach, because of various devices meant to allow science fiction worlds to compete with reality.