“Righteous exalts a nation, but sin is a reproach to any people.” Proverbs 14:34
Unrighteous makes people stupid. It does it by tricking you into thinking that your fallen nature is capable of rational thought and your motives are pure. Satan makes sure that there is always real cheese in the mouse trap. “Come to me all ye that labor and are heavy laden and I will give you rest. Take my yoke upon you and learn of me, for I am meek and lowly in heart and ye will find rest for your souls.” - Jesus
Yep. Stupid, lazy and dangerous.