" You, I said, who are their legislator, having selected the men, will now select the women and give them to them;—they must be as far as possible of like natures with them; and they must live in common houses and meet at common meals. None of them will have anything specially his or her own; they will be together, and will be brought up together, and will associate at gymnastic exercises. And so they will be drawn by a necessity of their natures to have intercourse with each other—necessity is not too strong a word, I think? Yes, "

― Plato , The Republic