Aristotle’s statement that it isn’t the time to debate if tragedy is fully developed, along with his reference to the current state of tragedy as its “natural state,” imply that he believes tragedy
is fully developed regarding its parts. Tragedy has developed into a state that Aristotle considers “natural,” which is to say that its current state is perfect—or at least as close to perfect as possible. In early drama, plays consisted of a single actor interacting with the chorus, until Aeschylus increased the single actor to two, followed by Sophocles’s addition of a third actor. In early dramatic performances, a single actor played multiple parts.