Alcibiades, the ablest but the most unpatriotic and unscrupulous of the Athenians of that time, was in 412 B.C. an exile from his native city under sentence of death[189]. He had in 415 B.C. been appointed one of the three commanders of the great expedition to Sicily: but, when it was on the eve of starting from Attica, he fell under suspicion of having committed a great crime by wilfully offending one of the gods who protected Athens and of designing to overthrow the Athenian constitution[190]. As however there was no proof of his guilt, legal proceedings could not be immediately instituted, and he was allowed to sail as one of the commanders of the fleet: but when he reached Sicily, he found awaiting him the Salaminia, the swift galley which carried despatches, and on board of her some officers sent by the Athenian assembly to summon him home to stand his trial[191]. These officers had been instructed not to arrest him but merely to bid him come to Athens for trial: accordingly he sailed homeward in his own ship, under escort of the Salaminia. On the way the two ships touched at a port in southern Italy, and Alcibiades went ashore and escaped from his custodians: soon afterwards, getting a passage to the Peloponnesus[192], he went to Sparta and advised the Spartans how they might best defeat the Athenian forces in Sicily[193]. The charges against him were produced before one of the popular law courts at Athens: and, as he did not appear, he was found guilty and condemned to death[194].

With the Spartans Alcibiades gained great influence, partly through his intimacy with a powerful man among their Ephors, and partly by the sound advice which he gave them as to the best way to injure Athens. In the year 412 B.C., at his own earnest desire, he was sent to act on behalf of Sparta in some of the cities of Asia Minor which were in alliance with Athens, and to induce them to change sides in the war[195]. Before long however the Spartans had reason to suspect that he was betraying their interests, and sent an order to the commander of their fleet off the coast of Asia to put him to death[196]. Alcibiades was warned, and, fleeing to the court of Tissaphernes, a powerful satrap of the king of Persia in the south-western part of Asia Minor, became no less zealous and efficient in opposing the interests of the Spartans than he had been in promoting them: and, after winning in some degree the confidence of Tissaphernes, he induced him to withhold a large part of the money which he had been in the habit of furnishing for the pay of the sailors in the Lacedæmonian fleet[197]. Having thus completely destroyed his credit with the Spartans, he desired nothing so much as to obtain pardon for his offences from his own countrymen[198]: for he hoped that, if once the sentence which had been passed on him were cancelled, he might return to Athens and recover some of his former popularity and influence.

Alcibiades knew that the Athenians were in a sore strait, and were longing for an alliance with the king of Persia: and in this desire of theirs and his own friendly relations with Tissaphernes he thought he saw the means of effecting his return: for, if the Athenians could only be persuaded that he was able and willing through influence with Tissaphernes to bring about the desired alliance, they would not only let him return but would welcome him as a valuable friend in their distress[199]. He believed however that his restoration could more easily be brought about if the present quiet and orderly government of Athens were to come to an end, and the city were thrown into the turmoil of a revolution[200]. The surest way to cause political disturbance was to try to substitute an oligarchy for the existing democracy: and this accordingly was what Alcibiades did, not that he liked oligarchy better than democracy, but because he thought that any political troubles at Athens might conduce to his restoration[201]. He sought for fit agents to bring about the desired revolution, and found them among the officers of an Athenian fleet stationed at the island of Samos near the coast of Asia Minor[202].

The part of Alcibiades in the revolution consisted only in giving it a start by raising false expectations of a Persian alliance. His agents went to Athens, and there Pisander, who took the leading part among them, addressing the assembly of the citizens, urged that the only hope of salvation for Athens lay in an alliance with Persia, and declared that that alliance would be made if they would invite Alcibiades to return, abolish their democracy, which was not to the liking of the king of Persia, and set up in its stead an oligarchy which the king could trust[203]. The assembly was grieved at the prospect of losing its democratic constitution, but under the stress of circumstances gave some kind of provisional approval of the proposed change; for the present however it took no definite step beyond appointing Pisander and ten other men as envoys to negotiate with Alcibiades and Tissaphernes. Pisander remained for a while in Athens for the purpose of visiting all the oligarchical clubs which already existed there and preparing them to be ready to strike a blow against the democratic constitution: this done, he departed on his mission[204]. It soon became evident that Alcibiades was powerless to obtain help for Athens from the king of Persia or even from Tissaphernes: a breach occurred between him and the oligarchical conspirators, and he took no further part in their proceedings[205].

During the absence of Pisander the oligarchical clubs at Athens prepared the way for the success of his designs by skilfully organising a series of assassinations. The persons selected to be murdered were the most faithful upholders of the democratic constitution: the assassins were never brought to justice: and such general terror prevailed that men did not dare to mourn for the victims lest their own turn should come next[206]. Meanwhile the chief politicians in the oligarchic party, wishing to disguise their real designs, gave out that the changes in the constitution which they would advocate were moderate in character: they would limit the number of citizens who formed the ecclesia to a number not exceeding five thousand, consisting of those who were best able to aid the state by paying taxes or by serving in the war, and would propose that henceforth wages from the treasury should be paid to none but the soldiers and sailors: but in other respects they would wish the constitution to remain unaltered[207].

Pisander, on his return to Athens about April 411 B.C.[208], was eager for the establishment of an oligarchy, with himself as one of its leading members: and, even if he had wished to pause in his measures, it was now dangerous for him to do so, because, if the citizens recovered from their terror, he would be prosecuted under a Graphê Paranomôn for the proposals which he had made and carried last year, and would undergo severe punishment. One of his adherents named Pythodorus at once proposed to the assembly that it should appoint a small committee of citizens to make a draft scheme for a new constitution: Cleitophon, who was probably an opponent of Pisander, moved that it should be an instruction to the committee that they should examine the ancient constitution of Cleisthenes to see whether any of its provisions ought to be revived. The proposal of Pythodorus was carried: whether Cleitophon's instruction was accepted or rejected we do not know[209].

Within a short time the committee had prepared its proposals. An assembly of the citizens was summoned to meet, not as usual at the Pnyx within the city, but at the hill of Colonus, more than a mile outside the walls. At this assembly the proposals of the committee were announced; and they were to the following effect. (1) Any Athenian citizen may propose whatever he thinks fit; and no proposal shall make him liable to a Graphê Paranomôn. (2) The government (that is to say, the right of speaking and voting in the ecclesia) shall be entrusted, during the continuance of the war, to a body of citizens numbering not less than Five Thousand, and consisting of those best qualified by bodily vigour for serving in the war or by wealth for contributing to the public treasury. (3) During the continuance of the war no wages shall be paid from the treasury except to the army and navy, and the nine archons and the presidents of the assembly and council[210].

The proposals bore a specious aspect of moderation, and seemed to promise that the new constitution should be something like the old constitution of Cleisthenes. The assembly gave its assent to these proposals: but, as soon as that assent had been given, it found that further and more radical changes awaited it. A motion was made and carried that a second committee of a hundred citizens should be appointed to give more precise shape to the new constitution. The report of this second committee, an elaborate document, disclosed the real intentions of Pisander and his party. It set forth a complicated scheme of government which was to come into force at some future time: but it also did what was more important by proposing that for the present a council of Four Hundred should be elected, that the Four Hundred should appoint ten generals and a secretary to the generals, and that the eleven men thus appointed should have power to do everything except alter the laws[211]. The proposals were ratified by the assembly; the council of Four Hundred, being elected during the reign of terror which had been established, was no doubt entirely filled with the adherents of Pisander, and the ten generals and their secretary no doubt included Pisander himself and his most ardent partisans. No steps were taken to call the assembly of Five Thousand into existence, and thus all political rights had been taken away from the mass of the citizens, and unrestrained power was conferred upon Pisander and his fellow-conspirators[212].

The proceedings of the oligarchy which had thus been founded are not narrated in detail by our authorities: but we are told that the new rulers governed violently, and made many changes in the administration: that they "put to death some few men who seemed convenient to be got rid of, imprisoned others, and removed others from Attica[213]," that they fell to quarrelling with one another[214], and that at last they were suspected of a design to introduce a garrison of Spartans into the Piræus, the port of Athens. As soon as this suspicion gained credence the days of the oligarchy were numbered. A battalion of Athenian hoplites, employed by Pisander to build a fortress at the mouth of the Piræus for the reception of a Lacedæmonian garrison, rose in mutiny against their officers, held a meeting in Munychia, which adjoins the Piræus, to decide on their course of action, and after due deliberation marched into Athens and piled arms at the foot of the Acropolis. Many specious offers of ineffectual reforms were made to them by envoys from the Four Hundred: but they insisted on the one thing which the oligarchy most dreaded, a free assembly of the citizens to be held within the city. The citizens met in assembly at the Pnyx, and their first resolution declared that the power of the Four Hundred was at an end[215].

After the deposition of the Four Hundred, which occurred late in August 411 B.C., the Athenians had to decide what their government should be. Two courses lay open to them: they might rescind all the enactments which they had made four months earlier, and so return at once to an unmixed democracy: or they might allow those enactments, except such as were obviously mischievous, to remain in force. The second of the two alternatives was that which they adopted. They reaffirmed in substance the regulations which had been recommended by the small committee elected under the resolution of Pythodorus, and enacted: (1) That the government should be entrusted to the body of not less than Five Thousand, which they had already ordered to be created. (2) That every citizen, who furnished the equipment of a heavy armed soldier, either for himself or for any one else, should of right be a member of this body. (3) That no citizen should receive pay for any political function, on pain of being solemnly accursed or excommunicated[216]. The constitution thus established was partly democratic and partly oligarchical: it contained a preponderant element of democracy because it gave supreme power to a numerous body, who, though they were called the Five Thousand, were in reality about nine thousand[217]: but it also contained some small oligarchical ingredients, since it excluded the poorest citizens from the ecclesia, and by withholding payment for the discharge of political functions made it likely that few citizens would be able to serve on the council of five hundred and in the popular law-courts except those who had money and leisure. Concerning the motives which induced the Athenians to adopt this mixed form of government we have no information, and can only observe that the new constitution would certainly commend itself to the body of hoplites who had delivered the Athenians from their oppressors, since it gave supreme power to the class to which they belonged; and that, from what we know of the political opinions of Socrates[218], we may be sure that it met with his hearty approval and was supported by his powerful advocacy. In regard to the merits of the new government we have an emphatic testimony from Thucydides, who says that of all the governments that ruled Athens within the space of his lifetime this was the best[219]. But the mixed form of government was not suited to the needs and the condition of the Athenians: for within a few years—certainly before 406 B.C. when they condemned the commanders at Arginusæ, and possibly as early as 410 B.C.—they abandoned it and reverted to their well-tried system of unmixed democracy.