The world has shrunk
Not in a physical sense, but information can travel a lot quicker than it used to.
Some time ago, there was a 5.4 earthquake in Melbourne at 8.55pm. My sisters and I felt it. A few minutes later, my friend, who was in another country, contacted me to ask if any of us were injured in the earthquake. On the other hand, my parents, who were out of the house at the time, did not feel anything. They weren’t even aware of the earthquake until they returned home some time later. That means that there were people halfway across the globe who knew about the earthquake earlier than those who were actually in Melbourne.
See. This is why so many movies/books/cartoons… like to pretend that communication devices don’t exist. Just think about a movie/book/cartoon… Chances are, if they could just call each other to coordinate things or whatever the plot needs, the movie/book/cartoon… would be a lot shorter.