"Conversation is the beginning and end of knowledge," wrote Stephano Guazzo in his "Civil Conversation". Like Guazzo's, this is a book dedicated to the Renaissance concept of conversation, a concept that functioned simultaneously as a privileged literary and rhetorical form (the dialogue), an intellectual and artistic program (the humanists' interactions with ancient texts), and a political possibility (the king's council, or the republican concept of mixed government). In its varieties of knowledge production, the Renaissance was centrally concerned with debate and dialogue, not only among...