Sermons on Justice

Injustice is rampant in our world, that cannot be disputed. In fact, those who study such things have stated that injustice is one of only a handful of universal human responses to the world. The source of injustice is clear, it comes predominantly from human selfishness. Obviously, the church should never be the source of injustice, and we should be at the forefront of combating injustice. The question is, how do we go about doing that?