imperfection of human nature

Such an association would, of course, be a prey to all the ills which so often lead to degeneration in learned societies, dangers which are inseparably bound up with the imperfection of human nature.

"But honestly, you know--horrible things do happen, thanks to the imperfection of human nature, but you can forgive the means if the end is a rejuvenated nation that--" "I can do nothing of the kind!

The camera rides along with officers as they identify and apprehend the titular lawbreakers; subject them to a mild dose of on-camera humiliation that leaves you amazed, for the millionth time, that people sign releases; and then conduct rueful post-mortem discussions of the imperfections of human nature.