The statement that best compares the causes of absolute monarchy and constitutional monarchy is:
"Absolute monarchy and constitutional monarchy both usually emerge from chaos, but constitutional monarchy depends on the wishes of those other than the monarch, while absolute monarchy has to do with only the wishes of the monarch."
This statement highlights the key difference in the basis of authority and governance in each type of monarchy, emphasizing the role of external influences and the populace in the constitutional model, contrasted with a singular focus on the monarch's will in absolute monarchy.