What timeline? Did you post it?
One principles founders used as part of the basis for the constitution were <u>popular sovereignty</u>.
One factor was barbed wire. As farmers and ranchers wisened up, they used the wire to fence in their cattle, destroying the use of cowboys, and taking away one aspect of the "wide open west".
Herds of cattle took over the plains and destroyed the grass. In 1883 t big drought struck and water streams dried up and prairie fires grazed. Also the barbed wire and the natural disasters. People wanted to be able to mark their property.
Answer:
The Industrial Revolution
Explanation:
The trend toward city life, also known as urbanization, was caused by industrialization. Many families left their farms to work in factories in the cities. This lead to a rapid move towards city life in the 1800's :)
