Is evil inherent in human nature? That is, are some people just "born evil," or is evil caused by circumstance or environment?
People are not just "born evil". In society, children are considered innocent. Children grow up being influenced by the people around them. So, if a child grows up in a bad home with a family who does not properly care for them or in a bad environment, then that is when they have the possibility to grow up to be "evil". Gru is the perfect example. When he was a little kid, he was sweet but his mother, who was not a good person, made him into someone evil. Then when he adopted the little girls, they influenced him and made him into a better person again.
"You are only going to be as good as the people you surround yourself with." -Anonymous