Answer:
Because of all the financial and natural loss. When a colonizer takes over a territory, then all of its riches belong to it. Those riches are usually land, plants, minerals, wood, etc. It can reap a lot of riches from those colonies because they practically belong to it.
However, if one day the colony decides to fight its colonizer and achieve independence, the colonizer loses all of its profit. That why it would never support its independence and usually other countries who would support it would end up in a war against the initial colonizer.
I think you mean decentralization. It's the transfer of authority from the main government to local governments.
Answer: The Church
Example: More churches were built, and these became centers of great activity. Schools were now established throughout the middle and western portions.
