There are only two types of people in the world:
1. People who believe the world can be divided into two types of "workers" - light and dark.
2. People who don't.
Lightworkers and Darkworkers both have belief #1.
P.S. The above comment is ironic.
In practice there are more than two types of people: For example, people who believe the world
can be divided that way, but that it's only one of many possible ways to divide it.