Why? Most of the world living better than 20 years ago and way better than 50 years ago, so the trend looks positive.

bombing civilians even outside their own country and work with islamist militias

To be fair that’s what most of NATO is/were doing.

Ah yeah, located in Sweden, country known for the Pirates Bay scandal that may also soon introduce a law requiring apps to have backdoors to access user’s data. Great choice.

Why were their powers limited?

So there were five godlike beings sent to fight Sauron. Only one of them did his job.

I need to reword it.

You are the big cool powerful god. One of your servants, a minor much less powerful god does bad things to the world. So you send five your other servants just as powerful as the bad one to deal with him.

A lot of time passes. Three of those spend their time chilling. One joins the bad one. The last one turns out too weak. Who solves the problem? Four hobbits.

You really should reconsider your politics after that.

I don’t think the original books ever told anything about it.