Write an essay about the Western movie ‘The Searchers’.

I need an essay about the Western movie ‘The Searchers.’
This should not be just a movie review, but need more than that. The essay should have CLEAR DESCRIPTION OF THE MOVIE AND ANAlYSIS ABOUT IT.
and I need a theme of the essay.(the essay should not just tell plot, but should have a subject to focus on. such as: white supremacy)

Introduction should start with the context for the notion of Western Film, and an interesting hook which should be about a description of an important scene from the movie (and it should be related to the entire essay,) with some analysis or explanation about it as well. Introduction need clear theme too.

My professor said read the book ‘An Introduction to Film Genres’- The westerns. That chapter has specific explanation about the western films.
(I attached some important parts from the book)

It should be related specifically with the movie, and should avoid to be too general. Thanks.

The essay should not be more than 3 pages. It should be between 2-3 pages.

Here is a sample essay-http://www.rogerebert.com/reviews/great-movie-the-searchers-1956