Of course, you could try to diminish or destroy the sovereignty of others to get what you want, the way nations and people sometimes do, but human experience shows that you can usually accomplish more by cooperating than by conquering. Ultimately, however, we each have only as much sovereignty as we can demonstrate. Having sovereign rights and being sovereign are not the same thing. The way to increase your personal sovereignty is to increase your use of free will. For instance, if you work for someone and are ordered to do an unpleasant task, it can feel like you have lost some of your free will.
Personal sovereignty has a high price.
It's called personal responsibility. As you increase your use of free will, you also increase your responsibility for your own actions and reactions. If a lot of people were to greatly increase their personal responsibility our society would undergo tremendous change.