Justice is often framed in a legal perspective as a set of punitive rules for punishing "wrongdoers", a very limited view and one that doesn't define the total concept.
Justice, I believe, requires the recognition that the entire human race is one family and that all of us are responsible for the welfare of our family. The reality that today, millions of people are starving, homeless and suffering from incredible violence and war is the most obvious sign that we are not aware of what justice is or belive that it isn't possible.
Greed is the greatest obstacle to experiencing justice on our planet home. It has reached immense levels, especially in the corporate world where governments and entire nations are now controlled by this greed. There are some exceptions now, where a few corporate giants are beginning to recognize social responsibility in their work. People need to demand more of this attitude.