So I am playing a v37 game. Suddenly, about when I discovered Humanism I think, most of my cities appear as unhappy. I open my capital city and the number of unhappy people is mastodontical (almost twice the happy ones). This stays true for most other cities except the newer ones. After checking I sense the problem is with crime although I had no warning at all about it. Most of my cities are shrinking quickly. Luckily I have some money aside so I tried to remedy by mass building Guards. My capital city went from 1 Guard to 8 Guards in its garrison. Most other cities went from 1 Guard to 2 Guards (with the Crime fighting promotion at 4th level). 10 turns later, the number of unhappy people in my capital city is exactly the same (I checked). Just to check I activated cheats and I built every single crime-fighting building I could and 5 turns later nothing changed. I wonder what do I have to do to diminish crime now... I remember I played a similar game with v35 or v36 and nothing of the sort happened, I am a bit puzzled. Thank you for your help.