Answer: checks and balances
Explanation: it’s “ a system that allows each branch of a government to amend or veto acts of another branch so as to prevent any one branch from exerting too much power”
The Inca Empire used the Quechua communication system which was letters and Egypt used the Hieroglyphics which were symbols.
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The media helped promote nationalism and propaganda furthering war efforts. Communications made it easier to broadcast announcements and deliver secret messages (Ex: Fat man and Little boy-Named after two atomic bombs used for the bombing of Hiroshima and Nagasaki).
The ban of alcohol in the 1920's