I'm not aware of trends in neuroses and psychoses, I'm afraid. I can say that modern societies within which there is an eroded culture, religion and a sense of isolation in the crowd, or of being treated like a number, tend to have higher cases of depression. However, I'm fairly certain that there are ways to alleviate these issues through developing a more unified culture, and that can be with or without religion, and changing business practices.
I'm aware that some literature says that psychopaths are born that way. I'm also aware that some differentiate psychopaths and sociopaths. As for the former, I believe that psychopaths can be born due to genetics, but it's more likely prenatal damage/mutation, or post-natal physical damage to certain brain centers such as the prefrontal cortex, even in an adult, in which case it's difficult or impossible to reverse the problem but, in the case of abuse as a baby/toddler/child, I believe the potential exists to reverse the condition...Although it'd take a willing subject, and many years of therapy to rebuild the connections to the centers of emotions. I definitely agree with your closing sentence!!! :)