The third amendment gives the right to Americans who own their home to reject military troops to enter there home without permission. this was a problem back in the late 1800's with troops staying in the citizen private home by force. so it helps protects the citizen from having to take in a troop from the army
By the legitimate senior members of select families or 'houses
Comparative advantage I would think. Yep, Google-sensei confirmed it:) Comparative advantage is the answer.
Answer:
the answer is the monarchy