text: An invention of the 20th century which I think has significantly changed people's lives is the invention of the airplane.  The extend to which this invention has altered people's lives is astronomical.  The airplane opened doors to traveling and also broadened people's perceptions of the entire world.  It also introduced what seemed a completely impossible concept which no human is capable of doing without a machine: the concept of flying.
  	Before the invention of the airplane, long distance traveling was a very difficult, time consuming task.  For this reason people did not travel extremely long distances and missed the opportunity of visiting countries with cultures very different from their own.  One could travel by boat but this was inconvenient and often dangerous because of various things like disease, hunger, and threatening weather;  also as noted above, it was extremely time consuming.  Because of the lack of long distance travel people often had a very ethnocentric and limited concept of the world.  I have learned a lot about my own culture just from being in Spain and that is the only foreign country I have ever visited.  I can admit that before I came to Spain I was very ignorant about other cultures.  Even though I would watch the news and read about other cultures I still did not have the opportunity to witness it first hand.
  	The invention of the airplane has opened many doors and one other door is international relations.  Since the invention of the airplane the world has increased close contact between political systems, and international business endeavors.  The frequency that which foreign countries are able to communicate and negotiate face to face has improved drastically the establishment of international trade.  The airplane has also basically speeded up the whole postal communication system also.  Life with airplanes is more rapid paced.
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