Social Justice is when the justice is for everybody and everybody have to obey the laws. The social Justice cares people's rights and for the weakest. The countries proclaimed in February 20th of each year, the "World Day Of Social Justice"
I think that the Social justice is important because the rights should be to for everybody and also the rules, and the society could be a better society, and maybe all together can be equals and no everybody do that they want to do, and no some people have more rights than others, because maybe it could create a conflict.
God creates the 10 commandments for everybody and for everyone to obey them.
