The necessity of evil

Why can’t we all get along? Why are some people so irritating? Why are some so down right evil?
Although we don’t want any of these negatives, there is a place for them. They contrast and highlight the good. Without the evils, the good won’t seem so good. We would just take it for granted.
Evil was not part of God’s plan, and there will be an end to evil. But Satan has impacted our society so much that there are many who think doing good is only an alternative. But for an appointed time, let it be so. These evils will help in highlighting the good.