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Socrates comes across an unnamed companion who asks him where he has been, and Socrates tells him that he just came from a long conversation with Protagoras, the acclaimed sophist from Abdera. Socrates’s companion, excited by this news, asks him to recount the discussion. Socrates happily obliges. The remainder of the dialogue consists of Socrates’s story, and the action never returns to his conversation with this unnamed companion.
Socrates begins his tale well before daybreak that morning when his young friend, Hippocrates, comes to his house. Hippocrates excitedly tells Socrates that Protagoras, the most esteemed of the sophists, is in Athens. Socrates already knew Protagoras was in town, but he didn’t visit him. Hippocrates, who says “everybody praises the man,” and they “claim he’s the wisest at speaking” (43), urges Socrates to go with him to Callias’s home, where Protagoras is lodging.
At this point, the narrative focus begins to shift to philosophy. Socrates questions Hippocrates about why he is so eager to learn from Protagoras. Hippocrates believes that Protagoras is a master of wisdom, but Socrates tries to convince him that he does not know anything about Protagoras or the supposed knowledge that he is selling. He urges Hippocrates to act with caution, asking him, “Do you know what sort of risk you’re getting yourself into by putting your soul at stake?” (45). Hippocrates does not seem to know. Socrates compares sophists to merchants selling food for the nourishment of the soul (46). If a person is not an expert in what truly nourishes a soul and what doesn’t, Socrates says, then it is best to remain extremely cautious: “[D]on’t roll the dice and take a risk with the most precious things” (46).
Hippocrates and Socrates decide to go see Protagoras to hear what he has to say. They agree to take counsel with their friends afterward. Socrates also mentions that Hippias and Prodicus, two other important sophists, are also residing at Callias’s house. When they reach Callias’s courtyard, the doorkeeper refuses to let them through. He is fed up with sophists, which he presumes Socrates and Hippocrates are, so he slams the door in their faces. Socrates knocks again and assures him that they’re not sophists, and the doorkeeper lets them through.
Socrates names everyone who was at Callias’s house that morning. Many young men of Athens—including Critias and Alcibiades, both of whom have minor roles later in the text— are included in the group. Socrates sees Protagoras, Prodicus, and Hippias. He also introduces his reason for coming to Protagoras, which is Hippocrates’s desire to gain a high reputation in Athens and his belief that Protagoras will help him acquire knowledge through rhetorical training. Protagoras thanks Socrates for his circumspection but states that there is no need to hide anything; they may freely discuss these matters in front of everyone else. Protagoras mentions that, before him, other sophists hid what they were doing or channeled it through poetry or another medium. On the other hand, he practices sophistry for everyone to see.
Everyone gathers on benches and couches to listen to Protagoras, who tells Hippocrates that if he decides to use his services, he will be greatly improved for it. When Socrates questions this, Protagoras explains that he does not lead young men into strange arts like arithmetic or astronomy. Rather, he teaches people how to be good citizens through “the political art” of civic virtue (51). Socrates says that if Protagoras is right, it’s impressive that he is so skilled in politics—but Socrates suspects that he is wrong. Socrates points out that in crafts such as leatherwork or carpentry, only a specialist is trusted, but in the governance of a city, all citizens— regardless of craft—are given a voice in deliberation. Additionally, Socrates says he does not “regard virtue as being something teachable” (52). Even if Protagoras is a specialist in civic virtue, Socrates is not convinced that he could teach this skill to others. The Teachability of Virtue becomes a central theme in the text.
Protagoras then tells a mythical story of the creation of human beings. Two Greek gods, Prometheus and Epimetheus, are responsible for the dispensation of powers such as claws and wings to various animals. However, Epimetheus fails to give any powers to the only rational animal: human beings. Prometheus, being wiser than Epimetheus, notices this and steals the fire of the gods for them, providing humans with wisdom in many aspects of life. Despite this, they do not gain political wisdom until Zeus sends Hermes to humans to give them all a sense of shame and of justice. This story, according to Protagoras, shows that all humans have some understanding of justice and should, therefore, be permitted to deliberate in the affairs of the city.
After this story, Protagoras provides an argument supporting the view that civic virtue is learned through painstaking effort and, because of this, it is reasonable to believe that some people have more of it than others. Thus, society should accept teachers like him who help people develop this virtue. Humanity’s virtue, according to Protagoras, is the one thing that everyone in the city needs. He challenges the view that a parent can’t teach a child virtue by providing examples of punishment and corrective behavior. Protagoras does not even think it curious that virtue is teachable, instead suggesting that it would be quite odd if it weren’t (58). He also argues that the institutions and laws of a civil society make even its worst perpetrators of injustice far superior in civic virtue to hypothetical uncivilized people living in the wild. This also shows that justice, a cardinal virtue, is teachable. Protagoras ends his speech, which includes both story and argument, by stating that he should be commended for being of exalted virtue and that this makes him worth the fee he charges for his services.
Socrates claims to have been “spellbound” by Protagoras’s speech (59). Socrates then facetiously claims that he is swayed by Protagoras’s words, but he will need one thing cleared up before he concedes. This is the issue of the Unity of Virtues. Socrates wants to know if piety, moderation, and justice are three different names for one thing—virtue—or if they are, instead, three separate parts of virtue. He asks if these virtues are like the parts of a face—each retaining its distinctiveness but contributing to the whole—or like parts of gold, in which the chunks are melted together and undifferentiated from one another. Protagoras says they are like the parts of a face. He believes it is not necessary to have all the virtues to have one of them.
Socrates disagrees and questions Protagoras further. He develops this disagreement through a series of questions in which he discusses the virtues of wisdom and moderation. He gets Protagoras to agree that the opposite of wisdom is acting “without good sense” (62) and that the opposite of moderation is acting “without good sense” (62). This means that they have the same opposite and are, therefore, the same thing. Protagoras “very unwillingly” agrees to this, too (63). Protagoras, according to Socrates, is becoming angry. When Socrates asks him another question, Protagoras launches into an impassioned speech on the teachability of virtue, for which he receives a round of applause.
Socrates claims that he is forgetful and cannot keep up with Protagoras in these long-winded speeches. He requests breaking up the dialogue into the shorter question-and-answer format with which he’s more comfortable. Protagoras is reluctant to do this, and Socrates acts as if he is going to leave if Protagoras refuses. Callias bids him to stay, and this initiates a deliberation among the attendees as to how Socrates and Protagoras will proceed. Alcibiades, Critias, Prodicus, and Hippias all speak in this interchange. They agree that Socrates and Protagoras should dispute their ideas peaceably, not in a quarrel, and that they should reach a compromise on how to do so. Protagoras then agrees to ask the questions to which Socrates will respond.
These first two sections work together to set up the main lines of argumentation that will continue throughout the remainder of the book. They also establish the setting, characters, and themes.
The problem of the value and legitimacy of the sophists’ training is one of the main themes of the dialogue. The skills they taught were not uniform, but in the ancient Greek world, especially by the time of Socrates, sophistry was a popular practice. Sophists claimed to be highly skilled in wisdom. Generally, they traveled across the Greek-speaking world and offered their services for a fee. Some of them trained in arithmetic and astronomy, but it was also common for them to teach logical reasoning and skill in argumentation. Protagoras is such a teacher, though his focus is on teaching virtue in political life. Plato’s philosophical position, represented often in the character of Socrates, is fundamentally at odds with sophistry. Socrates, for instance, refuses to consider himself a sophist, as he takes neither money nor students. His concern is always with the truth and never with “making the worse argument seem the better,” of which he is accused and of which he accuses the sophists.
Socrates’s encounter with Hippocrates, which takes place well before daybreak, exhibits the mania and social confusion surrounding sophistry. Hippocrates is willing to empty his pocketbooks for Protagoras, although, as Socrates reveals, he has never met him. He is prepared to give himself over to a man he knows only through reputation. This shows not only Hippocrates’s lack of judgment about the way to acquire wisdom but also the social danger of a misinformed pursuit. He implies that unscrupulous sophists corrupt well-meaning individuals who are excited about learning wisdom and virtue. This is, ironically, an accusation Socrates faced at the end of his life.
As the dialogue progresses, the societal and personal questions—whether the sophists are a plague on the Greek world and whether Hippocrates will be harmed through his encounters with Protagoras—give way to a more fundamental philosophical issue. Protagoras believes that virtue is teachable, but for Socrates, the very existence of the sophists fills him with suspicion. The Teachability of Virtue is not obvious to him, and when he begins to question Protagoras, this is his primary concern.
The remainder of this section of the text primarily focuses on Protagoras’s response to Socrates. This is divided into two central parts: a story and an argument. The story answers the question as to how humans became skilled in the arts and acquired the sense of justice necessary for political society. The argument seeks to establish that virtue is something that can be taught and that Protagoras is in the best position to teach it. These long-winded speeches exemplify Protagoras’s craft. In addition to their explicitly philosophical purpose, they reveal the manner by which Protagoras is able to spellbind his audience. Even Socrates has to collect himself before delving further into his questions after becoming distracted by Protagoras’s masterful storytelling. The use of both a story and an argument to address two separate philosophical issues—with no explanation as to why a story should be used in one case and the argument in the other—allows Protagoras to show off his skill set for the sake of his potential customers and the audience that surrounds him.
Socrates says he always thought of philosophical conversation and the making of grand speeches before an audience as two different skills. He is clearly interested in the former. The insinuation is that Protagoras, although he appears to be engaged in philosophy, is actually just demonstrating his sophistry for the crowd. Socrates is hinting, as he will several times in this dialogue, at the distinction between appearances and reality. Sophists are associated with things that appear to be beautiful but are ultimately illusory. The philosopher, on the other hand, may not appear wise or capable of grandiose speaking but genuinely pursues the truth. This distinction between appearance and reality is also indicative of Plato’s most famous doctrine, Platonic idealism. This view divides the world into a realm of forms, or eternal truths, and the material realm of passing appearance. Socrates always has his eye toward the realm of truth. Protagoras, on the other hand, frequently—sometimes explicitly—takes his cue from the appearances of the material realm. Protagoras is, after all, famous for saying “man is the measure of all things,” which indicates a relativistic and anti-metaphysical frame of mind. This issue will remain salient in the later parts of the dialogue, especially in the discussion of courage.
By Plato