The judicial branch is involved in the system of law-making in the United States. Through their interpretation of the law, judges are an important part of the legal system and influence the way law is made and interpreted. They don’t just apply the law; they also make it.
Overlapping court systems provide each individual with more than just one court to protect that individual's rights. A person seeking a wrong to be righted may have alternate places to pursue a case. On the other hand, having overlapping court systems opens the door to the possibility of unequal or disparate administration of justice.
The United States has become much more diverse, and it is only fitting that the judicial branch more accurately reflects the demographic composition of the population. At the same time, judicial positions should be filled by the most competent and qualified candidates.
The judicial branch has no power of its own over implementation of enforcement of its rulings and is thus dependent on the other two branches to make this happen, relying on the executive to enforce its decisions and on the legislature to fund it. Hamilton said the judiciary has “no influence over either the sword or the purse” and “neither force nor will, but merely judgment,” stressing the court system’s reliance on assistance from the other two branches.