Why does Zinn dispute Henry Kissinger’s statement: "History is the memory of states?"

Zinn disputes Henry Kissinger's statement "History is the memory of the states" because he thinks that history is the memory of the people, and Kissinger looks at history from the viewpoint of leaders only.

Explanation:

the lowest among the social higher rank were the working class. this class remained detached to the political progression   of the country and was hostile to the other two classes