The answer to your question is
The Voting Rights Act was amended several times in the decades that followed, extending its coverage and increasing the government’s authority to determine where federal oversight was needed.
The Chinese Nationalists and the Chinese Communists united forces in 1926 to defeat the various war lords throughout the countryside of China who were keeping China in a state of semi-feudal anarchy.
One year later, Jiang Jie-Shi (CKS) and the Nationalists would stab the communists in the back in Shanghai, starting what would be a 20+ year-long civil war.
Principle of unity:
The phrase "WE, THE PEOPLE" is of singular importance because it stipulates that the power and authority of the federal government of the United States of America does not come from the various states or the people of the various states, but from an entity that is identified as the People of the United States of America, with the Constitution serving as a compact or contract between the People of the United States of America, the various states, and the new entity: the federal government of the United States of America. The importance of this language lies in the idea that the government does not derive its power only from the various states.