The congress was very powerful at the time and needed to be put in line. The two branches were created to control it. The remaining two branches were not specifically enumerated as thoroughly because they were still weak at the time and their power developed over time.
The First Amendment allows Americans to have basic freedoms, including speech, press, and assembly. Without these freedoms, we would not be able to live life as we do today. These freedoms enable us to express our opinions freely.
Fredrick wanted freedom for slaves and Captain canot didn't want freedom for slaves.
They offered defensive positions and safety to the people. They were also where the Lord lived and where the lord was is where the money was. Thus trade and economic prosperity happened around the castle. Many trades were needed to support the lord and his castle. The lords army had to be equipped and fed. Thus markets and tradesmen were needed to support the lord and his castle.