The divine right allows royals to take the position as the head of the kingdom.
Prior to the conflict between Britain and its North American colonies, the colonies were able to manage majority of its own affairs without Britain's interference. However, when Britain started implementing stricter measures on their colonies' trade and other affairs, the colonies didn't like it. This started the tension between both parties.
I'm not sure what your word choice is, but the economy during the 1920s was "good". Prior to the Depression, the economy was stable and business investments were increasing.
They agreed because they hoped it would offer stability for the U.S economy.
Effort to fine coals
effects of the agricultural revolution