Well we have two extremes in this country/Christianity. Those who don't believe in Satan or demons and those who think everything is caused by demons. You know the type, if your computer is running slow it has a demon. If you take naps in the afternoon you have a demon of laziness haha. They seem to forget that we as human beings, being sinful, are plenty capable of making bad decisions without a demon yacking in our ear. Of course there are the middle grounders such as myself and those who simply want nothing to do with the topic haha.
What I do know is that according to the Scriptures there are demons out and about in the world. In my work I've encountered them on several occasions. They aren't pleasant. But as for how many are out there, how involved they are in the goings on of the world, what their true names are, why some are out and others are not, I don't know. And I'm certainly not going to ask them, not that they'd tell the truth anyways haha. If God wanted us to know, it would be in the Book. All we know is that when they do pop up, we have authority through Christ to cast them out.