This volume presents new texts of Cicero's dialogues on political philosophy, De Re Publica and De Legibus, together with corrected versions of the editor's previously published editions of Cato Maior de Senectute and Laelius de Amicitia. The texts are based on a full reconsideration of the manuscript evidence and are presented in a clear and readable form. Powell has made improvements to the text that will be of lasting value to scholars of the philosophica, whether they be philosophers, textual critics, or scholars of a more literary or historical persuasion.