This is a hard question to answer. Hamilton defended the supreme court based on the fact that he felt like they were the least dangerous branch because they didn’t have any control over money or war. As true as this is they are free from answering to the other 2 branches. They are set up to be separate themselves from the influence of the legislative and executive branches and concentrate solely on upholding the Constitution. So they can rule strictly on the laws of the land.
For this to still hold true today we have to believe that these judges can rule on social issues, cultural issues or those with competing rights through the laws established. With these types of issues facing our country today, there is a lot of issues that can be left up to law interpretation by the judges. I do believe that today’s judges are influenced in these rulings by the party that appointed them.