According to "introduction to dark romanticism: american gothic," how do dark romantic writers address the theme of human nature?

You didn't provide the introduction, but Dark Romantic writers often believed that the human soul is corrupt and dark and tends to sin. According to them, no matter how much we try not to, we will eventually succumb to corruption and sin, which was explored by writers such as Poe, Hawthorne, Melville, and similar.

You can say in conclusion you always want to work hard and never give up because you need to prove yourself that your strong enough tana brave enough you want and need to reach each and everyone of you goals to achieve all your hard work that you have don’t