text: When I was in tenth grade a teacher said that the 2 most important inventions that made possible the idea of a repressive government were the machine gun and the radio. A machine gun can be used to keep civil peace, enforce Marshall Law.  The radio can be used to communicate ideas and under a dictatorship, propaganda.
  	In the 20th Century the machine gun has not changed all that many lives (except for those that it' s killed), but the invention of radio has made a tremendous impact.
  	The idea behind the radio is simple.  There is one transmitter and it sends its signals through the air, waves, with potential for millions of receivers.  In the 20th Century radio has become a source of information and entertainment.
  	Radio keeps people informed.  I don' t think any people of my generation can even comprehend now our lives would be different.  Every morning I listen for the weather forcast and dress accordingly.  At night one can sit by the radio  and hear how the events of the day unfolded.  Radio, hence, gives people the option of becoming passive observers rather than active participants in the news making process.  Newspapers had been around for many years but it was not until the invention of radio that the power of the media became evident.  Radio gives the ability to reach many more people, instantly.
  	As a form of entertainment, radio and its most important and now more common offshoot, television, has changed people's lives.  A typical day for a child in today's world, consists of going to school and coming home to watch T.V.  There have even been forms of entertainment, for example videogames, made for this other form of entertainment.  Nowadays everybody watches T.V.
  My señora, for example, is over 100 years old, and for her T.V. is the greatest thing in the world.  She sits in front of it all day and it keeps her happy.  Television offers soap operas, game shows, sit-coms, sporting events, movies and much more to keep us entertained 24 hours a day. 
  	In short, I don' t know what life was like before radio, but its invention has changed the way we see and do things.
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