Since only individuals act, only individual actions can be judged. Groups, governments, corporations, etc. are not acting entities and therefore cannot be judged. The individuals who act under the aegis of such groups can, of course, be judged. So what could social justice possibly mean?
Along comes the redoubtable Wendy McElroy with an answer. It is “forced distribution of ‘privileges’ across society with an emphasis on providing wealth and opportunity to classes of people who are considered to be disadvantaged.” It matters not whether a particular set of circumstances is the result of voluntary interactions. Individuals who are female, have dark skin, low income, etc. qualify automatically as victims. Examples of redress include affirmative action and progressive taxation.
Enough from me. Please go read Wendy’s post.