All is done with how does it benefit me. They step on everyone to get their way, use any means to get what they want and don't give a damn what anyone thinks. There are many Dark siders with a Light side, although the Dark is prime. It is a fact of the lower densities. There are some areas of the galaxy where Light polarity is predominant.
True Balance is the merging of Dark and Light sides so that there is neither.
This is the state of higher densities where Dark and Light cease to exist. This is not an easy state to achieve and it takes a lot of work, but it IS achievable. In order to reach it, you have to recognize the polarities for what they are and why they do what they do. There is no 'good' or 'evil', just different expressions. What is 'good' for one can be 'evil' for another.