Marbury v Madison established the judicial branch as the part of government that interprets and defends the Constitution. Since the ruling, what has been the main role of the U. S. Supreme Court? What is this power called?

The main role of the Supreme Court is to have the authority over how the United State's constitutional law is interpreted and applied.  

The power is called "Judicial Review"

    racial conflict and discrimination has existed ever since man learned to kill with rocks and bones. these conflicts arose from disputes between territory, power, wealth, religion, or simple difference. some of the most infamous racial disputes include slavery, the holocaust, and the civil rights movement.

    these listed disputes often resulted in casualties from all sides. riots, wars, imprisonment, and lynching are all commonly associated with racial conflict on severe levels.

      however, racism is an improving issue in recent decades. people are being more accepting and welcoming of diverse populations. though, the world isn't perfect and it will take much more time, if ever, until the world is rid of racism.

john social contacted the noble of religous