I think it depends on the person. But as they say, it is easy to make a good girl go bad.
They are neither. Our nature is made up of certain characteristics and instincts that can't be defined as good or evil. It's society and its norms that creates this.
That is the liberal position that society, upbringing, "nurture" accounts for almost everything.
That has been found to be false.
A whole lot of it is inborn.
So you don't think there is any real thing such as evil ?
If I burn my child with cigarettes taht is not evil ?
What society would consider it good to burn children with cigarettes.
I have to reject your relativism here wholesale.
And you are also incorrect about fending for themselves first, most people fend for their children first which is hardwired.