Wall Street Crash is the answer I think
Answer:
Printing press
Explanation:
The printing press was allowed for quicker production of text, as well as having the ability to duplicate in the thousands. A single pamphlet would be carried from one town to another, where it could duplicate even more.
Balance
It is the tendency of the social system, when disturbed, to return to its original state. This is because change in one element is often accompanied by changes in other related elements.
