I need help writing a thesis for an essay about Macbeth. Is Lady Macbeth responsible for Macbeth's downfall? I agree with the statement. I am currently...

Thesis
1:

Although the
thought of murdering Kingcrossed 's mind, Lady 's persuasion
skills are
ultimately responsible for Macbeth's decision to follow through with the

murder. 

Thesis 2:

Without 's persuasion skills,
Macbeth
would have been too cowardly to follow through with King Duncan's
murder.

Thesis 3:

Using shrewd
manipulation and control, Lady Macbeth is the
one ultimately responsible for
convincing Macbeth to murder King Duncan. 

Macbeth had
indeed changed his mind about murdering King Duncan. In Act 1, Scene 7,

Macbeth expresses his decision to proceed no further in the business of murdering
King
Duncan:

We will proceed no further
in this
business.
He has recently honored me, and I now have
the
Golden opinions from
all sorts of people,
Which I
want to enjoy for a bit longer, and
Not cast them
aside so
soon.

Clearly, Macbeth has changed his mind.
He
is matter-of-fact in his decision to proceed no further in the murdering
of King Duncan. Then,
Lady Macbeth begins her manipulation. She begins to
insult Macbeth's manhood:

Are you
afraid
To be the same man in reality
As
the one you
wish to be? Would you have the crown
Which you believe to be the
ornament
of life,
And yet live like a coward in your own
self-esteem,

Lady Macbeth continues to
manipulate Macbeth. She finally convinces
him to follow through with the
murder. In Act 1, Scene 7, he finally agrees to murder King
Duncan:

Im convinced, and I commit
Every part
of
my body to this terrible event.

No
doubt, Lady Macbeth is
shrewd. She uses her gift of persuasion to convince
Macbeth to murder King
Duncan.