The people did corruptly. Perhaps Jotham was wanting towards the reformation of the land. Men may be very good, and yet not have courage and zeal to do what they might. It certainly casts blame upon the people. Jotham prospered, and became mighty. The more stedfast we are in religion, the more mighty we are, both to resist evil, and to do good. The Lord often removes wise and pious rulers, and sends others, whose follies and vices punish a people that valued not their mercies.