How effective was Jimmy Carter in applying the human-rights principle to American foreign policy? How did his approach differ from the actions taken by Ronald Reagan?

Carter is known as great human rights actvist but involving that principle in clash with dictators was failure in many aspects of foreign policy which exemple is Teheran crisis in 1979 and 80 and impotence of action by Carter administration, it was very diferent approach than Reagan who supported strong foreign policy (Teheran captivites were released hours after he took office)