Because all three of those books where written by different people that were alive during the same time. . . (Judges was multiple people)
Answer:
The Northern renaissance was more of a visual thing. It was all about obvservation and what you saw in a work. But in the Italian renaissance, they focused on anatomy and body proportions when it came to observation in their work.
The United Nations was formed to ensure that an event like WWII would never happen again.