Since Canada is a constitutional monarchy, every act of the government in Canada is considering consulting in the name of the Crown but for those situations and acts the peoples' authority is the one who is obligated and taking into consideration. Canada's executive authority is assigned by the Constitution.
Marbury v. Madison is important because it established the power of judicial review for the U.S. Supreme Court and lower federal courts with respect to the Constitution and eventually for parallel state courts with respect to state constitutions.
The hindus didn't change the caste system so its not a big difference because they didnt accomplish in changing the caste system. This was just a belief of the hindus im pretty sure