answer:The real reason for depression in my estimation is the western culture. Consumerism, families where both parents have to work for a living, millions of people who have to work 2 jobs to survive, societial expectations of behaviour, fashion, beauty, possessions. All that religion could do against that is based on either “ignorance is bliss” or the placebo effect resulting in certain mental states that can also be induced by drugs. You could just as well take anti depressants and use the sundays to relax. What you also do not consider is the fact that the amish have completely different lifestyles that are opposed to western culture as mentioned above, and that non-religious people/atheists, have to hide their atheism because they have to expect discrimination based on their non-belief. Atheists are the least trusted minority in the US.