Define Social Justice

There are different definitions of social justice. Take criminal justice, for instance. The criminal justice system executes the laws and punishes those who violate them. This is one kind of justice, but is not complete, for it does not evaluate whether or not those laws are in fact ethical, and does not interest itself with whether structures outside of the law are ethical. Of course I'm looking at this through Catholic lenses. I know that the only true justice will be in the after life, but I propose that any definition of social justice include:

1. Life from birth to death must be preserved because humans are made in the image of God.
2. We must take care of each other--all humans.
3. Resources are given for everyone to use.

The implementation of these three principles is what we have to figure out.