Can someone help me understand, drivers

I wonder if someone out there can help me understand something that our society is doing. First let me explain that you should picture a four lane road, two lanes going north and two lanes going south. Of course there is some sort of divider between, but these quite honestly can be a simple stretch of grass or a cement barrier.

In days of old, drivers would stay to the right. Whereas today, there is a tendency to move into the left lane and stay there. This is where I just don’t get it!

Here are my points:

1) The general rules of the road state, that you should travel in the right lane(s) and to pass on the left.

2) Traveling in the left lane, causes traffic to become congested. It is NOT up to anyone to control the flow of traffic and must move to the right so that others can pass them. Instead drivers are tending to just ride right along side of another vehicle traveling at the same speed. This of course, in our two lane example, totally blocks the road. Or you have drivers weaving in and out of lanes trying to get around, thus causing dangerous situations.

3) Let’s assume that you are traveling at 50 MPH, as is a car coming in the opposite direction. If one of you, for any number of reasons, moves into the others path, they will have a head on collision of about 100 MPH force. Personally, I’d rather drive as far away from oncoming traffic as possible!

So, can someone please explain that this is all about? I just don’t understand why people do this and of course it causes road rage as well.