Regions with a higher quality of life have a higher suicide rate. David Lester has a theory:
If your quality of life if poor, and it may be you’re unemployed, you’re an oppressed minority, whatever it might be, there’s a civil war going on, you know why you’re miserable. You know as the quality of life in a nation gets better and you are still depressed — well, why? Everybody else is enjoying themselves, getting good jobs, getting promotions, you know, buying fancy cars. Why are you still miserable? So, there’s no external cause to blame your misery upon, which means it’s more likely that you see it as some defect or stable trait in yourself. And therefore you’re going to be depressed and unhappy for the rest of your life.