The main message was that the United states wouldn't interfere with any European affairs, and that the western hemisphere would be closed to European expansion.
Explanation:
This is because under the Monroe administration, they promised to stay out of European wars and affairs, and it was important for the still developing United States to strengthen it's army as well as it's economy.
ONe large one is that a ruler can not rise to power without a consensus of other people in the government and the public. A dictatorship is nearly impossible with a representative democracy.
