Possible Clues:

• Dissolute old rebel leader sunk in depression
• Lacking in moral vigour
• In moral decay
• Having inserted advertisement, becoming morally weak
• Dissolute young trainee mostly overwhelmed with depression
• Rebel in study with time could become lacking in moral vigour
• After ten years, good books decaying
• Corrupt worthy accepts promotion
• Study includes California, Germany and Middle Eastern type that's corrupt
• Morally deficient; declining