De-evolution will be forced as it is continuously maintained in the animal kingdom.
For instance. All of the technology and knowledge gained today. Will be instantly lost, if there is no more electrical generation. The importance of farming becomes supreme over education and communications development.
A modern civilized society, which begins to believe what is right for me is good for me. There will no longer will be a need for any long term or mid term goals. Education is minimized. Civility becomes unimportant. Maintaining family ties and bonds, only when it is convenient and if you profit more from it.
Braking laws is only wrong when you get caught by the governmental authority. But, then braking any governmental law isn't really doing anything wrong. When you believe you are the authority and creator of your own personal laws.