What are the motifs in Oroonoko: An Authoritative Text, Historical Backgrounds, Criticism by Aphra Behn?

Man's Freedom/Slavery is a recurring idea. It is tragic irony that the man who gathered slaves for sale in his country, Prince Oroonoko, is betrayed by the slave trader and becomes a shackled slave himself. Although, of course, unhappy with his fate, the eloquent Oroonoko is brave and accepts it. He tells his captor, Captain Driver, that though he may be able to make him submit physically, he will never conquer his spirit, which is free and strong.