I have found it interesting, even questionable that when Jesus was in His ministry on earth, the Gospels note many occasions of demon possession. It is recorded many times of Him casting out demons. I would imagine that during the first Century, it kept up. What I find interesting is in undeveloped Countries, there are records of demon possession among the natives and even more educated areas. This Country, with a large Christian population, there does not seem to be as much. I am puzzled though, at the seemingly high percentage of mental disease there is in this Country, and how much the evil one has to do with that.
It is so difficult to know really if mental problems are a result of chemical deficiencies in our body's or if there is a more sinister cause. Extremely hard to differentiate.
not so hard really, if they are willing to test. test and see. the doctors who actually test their patients have much better results than the doctors who don't test their patients (for nutritional deficiencies; the body's not made for chemicals).
it is not standard ama protocol(procedure) to test for nutritional imbalances anymore though, since about 1950.
'everyone' knows that chemicals used are used to treat symptoms, not to treat causes (because causes aren't identified anymore).
once the cause is known, it's usually a piece of cake, and makes all the difference in the world ---
best known example: scurvy(vitamin c deficiency once common among sailors , until they learned about it and started taking limes, lemons and oranges with them on long journeys--- tada ! no more scurvy then.)
scurvy today is rampant(wide spread), but nobody routinely tests for it. if they bother to test for it, a lot of problems are resolved just as easily as it was for the sailors.
moving on to
faith.
so-called third world countries have more people of faith, and stronger faith, than 'developed' countries. ('more' but still not many)
even Jesus "did not do many miracles" in some cities, because of their unbelief.
"This country" is a lot like the state religion that constantine started officially /legally- if you didn't say you were a chrisian, you were subject to arrest, banishment, or death, so 'everybody' suddenly was declared 'christian'.
it is still popular to be 'christian' in some cities(not as many as it used to be), especially in the untied states, so there's a lot of 'declared' christians who are christian in name only, and they don't even know the difference.(but God knows, and where there's not true faith, He doesn't do many miracles today, just as in the Bible).