As Albert Einstein once said: "The world is too dangerous to live in, not because of the people who do evil, but because of the people who just sit back and let it happen. » The horrific stories told about the Holocaust from inside the ghettos symbolize the neglect shown by others during World War II. World War II began with Germany's attack on Poland on September 1, 1939 (World War II in Europe). Many citizens of neighboring countries were terrified by the horrific acts they heard about. Hitler took power and tried to kill as many Jews as possible. The word ghetto did not appear around the time of the Holocaust; ghettos were mentioned in the 16th century (Ghettos). Ghettos were areas isolated from surrounding cities, demarcated by walls or fences. The different types of ghettos varied in size. The smallest house in the ghetto could accommodate at least three thousand people. The largest ghetto was that of Warsaw and could accommodate four hundred thousand people. The second largest ghetto could accommodate sixteen hundred thousand citizens: it was Lodz (The Ghettos). During World War II, there were three types of ghettos: open ghettos, closed ghettos, and destructive ghettos (Life in the Ghettos). Open ghettos were not created as often as other types of ghettos. Open ghettos had certain rules for entering and leaving the area they were in (Types of Ghettos). Walls and fences were not characteristic of open ghettos, making living conditions more favorable than other types of ghettos. The Belchatow Ghetto is an example of an open ghetto. The ghetto was created there between 1940 and 1941. Residents could only leave the ghetto at certain times (Belchatow). Another example for an operation...... middle of paper ......d=10005247>."Killing Centers." June 10, 2013. United States Holocaust Memorial Museum. March 16, 2014 “Life in the ghettos”. June 10, 2013. United States Holocaust Memorial Museum. March 16, 2014, “Lublin/Majdanek Timeline”. June 10, 2013. United States Holocaust Memorial Museum. March 16, 2014 “The Ghettos”. July 14, 2009. Teacher's Guide to the Holocaust. March 16, 2014 “Types of ghettos”. June 10, 2013. United States Holocaust Memorial Museum. March 16, 2014 “The Second World War in Europe”. June 10, 2013. United States Holocaust Memorial Museum. March 18 2014 .