Hi cantleave
What is more evil a man who kills in ignorance for survival? or a man who knows the people he is killing are fully as worthy to live as themselves. What really makes us more evil now is we know exactly what we are doing when we kill another person, or allow another person to starve to death, allowing money and riches to be our goal instead of humanity.
I truly think it is our greater knowledge and evilness despite this that condemns us more now.
Romans 2:14-16 (New International Version)
14 (Indeed, when Gentiles, who do not have the law, do by nature things required by the law, they are a law for themselves, even though they do not have the law, 15 since they show that the requirements of the law are written on their hearts, their consciences also bearing witness, and their thoughts now accusing, now even defending them.) 16 This will take place on the DAY when God will judge men's secrets through Jesus Christ, as my gospel declares.