On Erulan, there is slavery and cruelty. Three bodies hang from a gallows in a market square. Ilaloa of the Alori comments:
"'There is no need for this endless strife and suffering. But it is still more - right - than that which is in the city Stellamont.'" (The Peregrine, Chapter X, p. 89)
Stellamont is on a human colony planet and thus represents a fifth culture distinct from Sol, Nomads, Erulan and Alori:
Sol, Nomads and Stellamont are human;
Alori are humanoid (see image);
Erulan is human beings enslaving (other) humanoids.
I can only remark that I disagree with Ilaloa. Technology-using urbanites are indeed "...shut away..." (p. 88) from nature but that does not make a slave-owning society better than they are!