For the Open Society (about 430 b.c.):
Although only a few may originate a policy, we are all able to judge it. Pericles of Athens.

Against the Open Society (about 80 years later):
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. Plato of Athens.
Laws I think.

I am setting out on a major reading effort of the year and of this coming winter. Popper's previous major book, The Logic of Scientific Discovery (Logik der Forschung) took a couple of years to read and a long time to re-read.

Popper committed to Open Society on news of the invasion of Austria and wrote through the war years to be first published in 1945. He addresses much of what is foundational to our dire straits. As Ayn Rand does, he lays much on Plato and our tradition of Platonism, and traces Platonism through many major social/political philosophers. Even Bayesian epistemologists mention the malignancy of Platonic Ideals in frequentist statistics.