Social ostracism manifests inside self and uses fear to prevent being different

Source: the dispossessed by ursula k leguin

p. 465 Shevek references "the sabul inside us" when saying neither he nor Tevek "chose" to not publichs. They let their decision be made for them out of fear. "Fear of being free." When freedom comes with being different, it leads to social ostracism.

The social nature of man leads to this being something to fear.