Could anything have been gained by including more scenes from the time before or after the events of Animal Farm's plot?

What I like
about the plot of is that it can apply to any society at almost any time.
The principles in the book clearly demonstrate human nature.

• When
  one group obtains too much power, even if it is a small group, if it's goal are evil or even
  just selfish, it can destroy a much broader group of people.
• When people
  stop thinking about holding leaders accountable or keeping them in check, they become victims of
  their own circumstance.
• When there is a revolution among a people, it
  almost always takes out a leader and creates a void of power. That void turns into a vacuum.
  Something must fill it, and that often is a new person, who because of human nature has selfish
  tendencies and most likely inexperience.

I wouldn't add anything
to the book because it already has very clear connections to the aftermath of the Russian
Revolution. No more conclusions need to be done. That was history, and this is now. These
principles need to be guarded against today.