One of the main differences between castles and manor houses was that "<span>d. Castles offered protection from invaders" since manor houses often had little protection of their own.</span>
Because he had to keep to a constitution. The kings before him were more or less absulutistic. In addition, the constitutional monarchy is seen as a historical transition between the "absolute" and the "parliamentary" monarchy.
It made the travel within the country much much easier
It made it easier to migrate westward due to the railroad and its abilities to get across the country in such a little amount of time
When Benjamin Franklin said "a republic, if you can keep it." he meant that The citizens of a republic have to participate and work to keep it.
He said this because our constitution is not a self correcting government. But, it requires the constant devotion and attention of all citizens in order to have a unified nation.