What does "trapped" mean in this context (from mini-ielts.com)?
Diamond interprets them as power displays by rival chieftains who, trapped on a remote little island, lacked other ways of asserting their dominance.
Does it mean that rival chieftains were trapped on a remote little island, or that they trapped someone on a remote little island?
I am confused about the grammar here.
By the way what does ''rival chieftains'' mean??
Thank you so much??