The following quote, attributed to Plato, stands at the head of Popper’s “The Open Society and Its Enemies” (vol. 1, ch. 1)-
The greatest principle of all is that nobody, whether male or female, should be without a leader. Nor should the mind of anybody be habituated to letting him do anything at all on his own initiative; neither out of zeal, nor even playfully. But in war and in the midst of peace—to his leader he shall direct his eye and follow him faithfully. And even in the smallest matter he should stand under leadership. For example, he should get up, or move, or wash, or take his meals … only if he has been told to do so. In a word, he should teach his soul, by long habit, never to dream of acting independently, and to become utterly incapable of it.
Popper points to Grote’s work as the source of his quotation. It seems, however, that Popper has translated it himself from the original greek. The translation of Plato’s Laws at the Perseus project is similar in nature-
The main principle is this—that nobody, male or female, should ever be left without control, nor should anyone, whether at work or in play, grow habituated in mind to acting alone and on his own initiative, but he should live always, both in war and peace, with his eyes fixed constantly on his commander and following his lead; and he should be guided by him even in the smallest detail of his actions—for example, to stand at the word of command, and to march, and to exercise, to wash and eat …; and, in a word, he must instruct his soul by habituation to avoid all thought or idea of doing anything at all apart from the rest of his company, so that the life of all shall be lived en masse and in common.
Though Plato writes in the context of war, the “war and peace” gives the game away.