Complex sentence: The Draags have no choice but to sue for peace with the suddenly-powerful Oms, and they come to realize that humans are hardly vermin, and deserve equal partnership in the Draag planetary system.
Split into simpler sentences: The Draags have no choice but to sue for peace with the suddenly-powerful Oms. They have come to realize that the Oms are hardly vermin, and deserve equal partnership in the Draag planetary system.