Why are they not all equal?

Some are set over others, in order that if one makes any mistake it may be corrected by the court above it. When a citizen claims he has been wronged in a lower court, he may take his cause to a higher one; this is called an appeal. If in this higher Court, he still is not satisfied with the ruling, he may appeal to a still higher court , until he has reached the highest Court in his own State.