I'm writing an essay on the theme of jealousy in Othello. What might three points or arguments be?Thank you!

In Othello, there are many instances
of jealousy.  Three that come to mind which would easily divide into paragraphs include
these:

1. Iago's jealousy of
Cassio - This jealousy occured in the first act, yet is carried out
throughout the play. Cassio earned a promotion that Iago had hoped to receive. This
motivates a great majority of Iago's actions and it results in many
deaths.

2. Othello's jealousy of
Cassio - Othello allows Iago to convince him that Desdemona is having
some kind of relationship with Cassio. After many staged instances, Othello acts on this
jealousy and eventually murders as a result of believing Iago's
lies.

3. Roderigo's jealousy of
Cassio - Roderigo maintains a position as a secondary character
throughout the text, but he allows his motivation to become a suitor to Desdemona to get
the better of him. Iago convinces him that there is something between Cassio and
Desdemona and this helps Roderigo attempt to kill Cassio by the
end.

All of these jealousies spring from the effort of
Iago. All of these jealousies take their ultimate fall on the character of Cassio. Each
instance of jealousy actually loses each character what they really had
wanted.