Heart of Darkness/Apocalypse now Comparison

Hello, I have an in class essay very soon, and i just need help as to whether my thesis correctly answers the prompt.

"Analyze the use of surrealism in both Heart of Darkness and Apocalypse Now to convey the meaning of 'the horror'".

Heart of Darkness and Apocalypse now both describe "the horror" as being the loss of civil morality through their use of surrealism in man's uninhibited violence and ungoverned greed.

Hey that sure sounds like an impressive response. What is this "the horror" concept from?

I mean, where did they get the concept to which they are referring?

I just did some research, and I'm feeling confident in your answer. "Spiritual horror" is a concept central to Heart of Darkness, for example.

I would revise, though:

Through the use of surrealism, Heart of Darkness and Apocalypse Now both portray "the horror" as being the loss of civil morality through their use of surrealism in man's in favor of uninhibited violence and ungoverned greed.