And having made it he divided the whole mixture into souls equal in number to the stars, and assigned each soul to a star; and having there placed them as in a chariot, he showed them the nature of the universe, and declared to them the laws of destiny, according to which their first birth would be one and the same for all - no one should suffer a disadvantage at his hands; they were to be sown in the instruments of time severally adapted to them, and to come forth the most religious of animals; and as human nature was of two kinds, the superior race would hereafter be called man. Now, when they should be implanted in bodies by necessity, and be always gaining or losing some part of their bodily substance, then in the first place it would be necessary that they should all have in them one and the same faculty of sensation, arising out of irresistible impressions; in the second place, they must have love, in which pleasure and pain mingle; also fear and anger, and the feelings which are akin or opposite to them; if they conquered these they would live righteously, and if they were conquered by them, unrighteously. ~ Plato: Timaeus
And God proclaims as a first principle to the rulers, and above all else, that there is nothing which they should so anxiously guard, or of which they are to be such good guardians, as of the purity of the race. They should observe what elements mingle in their offspring; for if the son of a golden or silver parent has an admixture of brass and iron, then nature orders a transposition of ranks, and the eye of the ruler must not be pitiful toward the child because he has to descend in the scale and become a husbandman or artisan, just as there may be sons of artisans who having an admixture of gold or silver in them are raised to honor, and become guardians or auxiliaries. For an oracle says that when a man of brass or iron guards the State, it will be destroyed. ~ Plato: The State, Book 3
First of all, in regard to slavery? Do you think it right that Hellenes should enslave Hellenic States, or allow others to enslave them, if they can help? Should not their custom be to spare them, considering the danger which there is that the whole race may one day fall under the yoke of the barbarians? And may I not observe with equal propriety that the Hellenic race is all united together by ties of blood and friendship, and alien and strange to the barbarians? ~ Plato: The State, Book 5
In the succeeding generation rulers will be appointed who have lost the guardian power of testing the metal of your different races, which, like Hesiod's, are of gold and silver and brass and iron. And so iron will be mingled with silver, and brass with gold, and hence there will arise dissimilarity and inequality and irregularity, which always and in all places are causes of hatred and war. When discord arose, then the two races were drawn different ways: the iron and brass fell to acquiring money, and land, and houses, and gold, and silver; but the gold and silver races, not wanting money, but having the true riches in their own nature, inclined toward virtue and the ancient order of things. There was a battle between them, and at last they agreed to distribute their land and houses among individual owners; and they enslaved their friends and maintainers, whom they had formerly protected in the condition of freemen, and made of them subjects and servants; and they themselves were engaged in war and in keeping a watch against them. ~ Plato: The State, Book 8 Sons, the event proves that your fathers were brave men; for we might have lived dishonourably, but have preferred to die honourably rather than bring you and your children into disgrace, and rather than dishonour our own fathers and forefathers; considering that life is not life to one who is a dishonour to his race, and that to such a one neither men nor Gods are friendly, either while he is on the earth or after death in the world below. ~ Plato: Menexenus
Athenian. Whether the better is ever really conquered by the worse, is a question which requires more discussion, and may be therefore left for the present. But I now quite understand your meaning when you say that citizens who are of the same race and live in the same cities may unjustly conspire, and having the superiority in numbers may overcome and enslave the few just; and when they prevail, the state may be truly called its own inferior and therefore bad; and when they are defeated, its own superior and therefore good. ~ Plato: Laws, Book 1
Cleinias. They will come from all Crete; and of other Hellenes, Peloponnesians will be most acceptable. For, as you truly observe, there are Cretans of Argive descent; and the race of Cretans which has the highest character at the present day is the Gortynian, and this has come from Gortys in the Peloponnesus. ~ Plato: Laws, Book 4
Athenian. Cities find colonization in some respects easier if the colonists are one race, which like a swarm of bees is sent out from a single country, either when friends leave friends, owing to some pressure of population or other similar necessity, or when a portion of a state is driven by factions to emigrate. And there have been whole cities which have taken flight when utterly conquered by a superior power in war. This, however, which is in one way an advantage to the colonist or legislator, in another point of view creates a difficulty. There is an element of friendship in the community of race, and language, and laws, and in common temples and rites of worship; but colonies which are of this homogeneous sort are apt to kick against any laws or any form of constitution differing from that which they had at home; and although the badness of their own laws may have been the cause of the factions which prevailed among them, yet from the force of habit they would fain preserve the very customs which were their ruin, and the leader of the colony, who is their legislator, finds them troublesome and rebellious. On the other hand, the conflux of several populations might be more disposed to listen to new laws; but then, to make them combine and pull together, as they say of horses, is a most difficult task, and the work of years. And yet there is nothing which tends more to the improvement of mankind than legislation and colonization. ~ Plato: Laws, Book 4
Which reflection led him to appoint not men but demigods, who are of a higher and more divine race, to be the kings and rulers of our cities; he did as we do with flocks of sheep and other tame animals. For we do not appoint oxen to be the lords of oxen, or goats of goats; but we ourselves are a superior race, and rule over them. ~ Plato: Laws, Book 4
O sir, we will say to him, the impulse which moves you to rob temples is not an ordinary human malady, nor yet a visitation of heaven, but a madness which is begotten in a man from ancient and unexpiated crimes of his race, an ever-recurring curse; against this you must guard with all your might, and how you are to guard we will explain to you. ~ Plato: Laws, Book 9
Now it is difficult to determine accurately the things which are worthy or unworthy of a freeman, but let those who have obtained the prize of virtue give judgment about them in accordance with their feelings of right and wrong. He who in any way shares in the illiberality of retail trades may be indicted for dishonouring his race by any one who likes, before those who have been judged to be the first in virtue; and if he appear to throw dirt upon his father’s house by an unworthy occupation, let him be imprisoned for a year and abstain from that sort of thing; and if he repeat the offence, for two years; and every time that he is convicted let the length of his imprisonment be doubled. ~ Plato: Laws, Book 11
SOCRATES: Do you not remember that he speaks of a golden race of men who came first?
HERMOGENES: Yes, I do.
SOCRATES: He says of them -
"But now that fate has closed over this race They are holy demons upon the earth, Beneficent, averters of ills, guardians of mortal men." (Hesiod, Works and Days.)
HERMOGENES: What is the inference?
SOCRATES: What is the inference! Why, I suppose that he means by the golden men, not men literally made of gold, but good and noble; and I am convinced of this, because he further says that we are the iron race.
HERMOGENES: That is true.
SOCRATES: And do you not suppose that good men of our own day would by him be said to be of golden race?
HERMOGENES: Very likely.
SOCRATES: And are not the good wise?
HERMOGENES: Yes, they are wise.
SOCRATES: And therefore I have the most entire conviction that he called them demons, because they were daemones (knowing or wise), and in our older Attic dialect the word itself occurs. Now he and other poets say truly, that when a good man dies he has honour and a mighty portion among the dead, and becomes a demon; which is a name given to him signifying wisdom. And I say too, that every wise man who happens to be a good man is more than human (daimonion) both in life and death, and is rightly called a demon. ~ Plato: Cratylus
SOCRATES: In the next place, consider that what you say is probably false.
ALCIBIADES: How so?
SOCRATES: Let me ask you whether better natures are likely to be found in noble races or not in noble races?
ALCIBIADES: Clearly in noble races.
SOCRATES: Are not those who are well born and well bred most likely to be perfect in virtue?
ALCIBIADES: Certainly. ~ Plato: Alcibiades
Did you never observe how great is the property of the Spartan kings? And their wives are under the guardianship of the Ephori, who are public officers and watch over them, in order to preserve as far as possible the purity of the Heracleid blood. Still greater is the difference among the Persians; for no one entertains a suspicion that the father of a prince of Persia can be any one but the king. ~ Plato: Alcibiades The following is my own wording however it is a description of Tribalist Classifications that were used both in The Holy Bible and in various and numerous Pagan sources from ancient times: Under the Tribalist system, there are Kinds, Races, Tribes, Clans and Families; a Kind has two meanings, which are determined by context - one is what is now called a Race, the other is what is now called a Sub-Group. A Race, under the Tribalist system, is a Nation; a Nation, under the aforesaid system, is a collection of Tribes of the same Kind. Kind, in that context, refers to a Sub-Group of a Race. A Tribe is an Ethnicity. A Clan is an extended Family. - Johan Szwec