It is important because it establishes the constitution as the supreme law of the land. That means that every person, regardless of their social status, and every state, regardless of their wealth or size, have to obey the constitution. If the supreme court says that something is unconstitutional then it will never be able to exist, and if they say that something has to be done then it will have to be done because of the constitution.
Both, Ho Chi Minh and Jomo Kenyatta were leaders of movements which wanted the right to (2) self-determination for their nation. Ho Chi Minh, for example, was an important figure for the Vietnamese resistances during the Vietnam war which was fought against the Americans. He was the leader of the communist part of Vietnam and with that also held the view that nations have the right to self-determination, as this is a commonly held view in communistically oriented individuals.
