With a view to exploring the concept and practice of friendship in Cicero’s work, the paper conducts a systematic review of the epistolary corpus with a focus on the portrayal of social relations, namely Cicero’s relationship with his friends, with political figures, and the more intimate connection with Atticus. One of the paper’s claims is that affectivity is not only a constitutive element of friendship but that it is present across representations of all social relations, albeit to different degree in different specific relations. Cicero is personally invested and deploys emotive language even in relationships with individuals who exist outside of his private sphere. Dictating Cicero’s behaviour across these engagements is his concern w...