Complex sentence: According to Jacob, the Man in Black's primary goal, to escape from the island would cause the spread of evil; various other characters have implied that his escape would be catastrophic and could even cause the destruction of reality.
Split into simpler sentences: According to Jacob, the Man in Black's primary goal, to escape from the island, would cause the spread of evil. Various other characters have implied that his escape would be catastrophic and could even cause the destruction of reality.