Important Inventions

The radio:
Provided a means of one way mass communication. The government has the ability to reach the people with issues, policies and propaganda.

The trans-continental telegraph:
Primary communication source for politics, media, and trade
Allowed news to travel faster, almost "real time"

The Telephone:
Instant two way conversations
Helpful for politics as well as business

The Photograph:
Although invented quite earlier than the twentieth century, the camera had been modified since its initial debut
The pictures taken during wartimes were valuable to the people back home, and provided persepective on a the World Wars that people hadn't been able to see before due to the great destruction the wars brough about

Recordings

In 1899, Vladimir Pulsen invented a way to record information using magnets. This quickly developed into faster, more efficient ways to store larger amounts. This developed the record and the tape, which in turn would lead to the CD and DVD. After this invention, leaders and normal people could communicate to one another without ever being present.

FDR

This is a great example of Mass Communication at work durring WWII. This is FDR making a nationwide speech on the war effort in 1943.