This book provides a theoretical and philosophical framework for the analysis of Plautus within a performative and philosophical perspective on language and theatrical performance. The book offers an insightful understanding of Plautus' texts as more than simple literary remains of archaic Latin literature, but as witnesses of a process of using language to perform an entire world through the recognition of the power of language itself as a creative and constitutive agent of theatrical codification and variation of its own rules and conventions. The analyses of several of Plautus' plays are carried out through the lenses of Cassin's proposal of an effet monde as a result of a performative sophistic view on language (especially regarding the sophists, as in her 1995 work L'effet sophistique), as well as Florence Dupont's unique stance on Roman Comedy as an example of non-Aristotelian theater, based on metatheater and convention-variation as special characteristics of a ludic theater which plays around with its own rules after putting them in the foreground. Barbara Cassin and Florence Dupont also contribute with a foreword and a preface.