What law does the author of utopia say a king should not enforce?

if a king should fall under such contempt or envy that he could not keep his subjects in their duty but by oppression and ill usage, and by rendering them poor and miserable, it were certainly better for him to quit his kingdom than to retain it by such methods as make him, while he keeps the name of authority, lose the majesty due to it.”

Explanation:

Among them is a slave named Arthur. Like Solomon and Robert, Arthur is a free man with a family and was kidnapped and sold into slavery. When the ship departs again for New Orleans, the captain appoints Robert as his waiter and Solomon as the overseer of the cooking department.