Plato claims that a psyche well-ordered by reason is just. To the extent that the passions, such as anger and the urge to dominate, are infused in human reasoning, a just order is not possible for members of our species. In dealing with healthcare workers in my hometown, I found what Plato would label as injustice. In fact, reasoning from that case led me to wonder whether justice is even possible.
The full essay is at "Human Nature Warping Rational Nature."