Federalism describes the system of shared governance between national and state governments. The states and the federal government have both exclusive and concurrent powers, which help to explain the negotiation over the balance of power between them.
Answer:
Inventions like the airplane and machine gun
Explanation:
World War I was so deadly because all of the new weapons that were invented. New technology that was being invented such as machine guns and mustard gas made war deadlier than every war before.
It protects against self - inscrimantion and bans being tried for the same criminal offence twice
