Temporary
This can be best known as a temporary, interim or emergency government. A temporary government is put in place when there is a large void due to the collapse of a large government.
Answer:
I would consider the adoption of gun powder
Explanation:
gun powder changed the world and is still widely used today for guns, explosives and rockets.
The economy was not doing well, soldiers were coming home with horrible PTSD and after-shock, the great depression was going on, etc. :)