The majority of the people in Ancient China were peasant farmers. Although they were respected for the food they provided for the rest of the Chinese, they lived tough and difficult lives. The typical farmer lived in a small village of around 100 families. They worked small family farms. Although they had plows and sometimes used animals like dogs and oxen to do the work, most of the work was done by hand.
Third parties rarely succeed in national elections because the vote is divided between the two larger parties. Take for example Clinton and Trump. The two largest candidates for the most recent national election, if there had been another candidate named Smith, and he was a third party representative and believe in Pro-Choice, higher taxes, and had similar views of Clinton, it would have diluted her vote and caused Trump to unanimously win the election.
I'm not sure of the exact word you are looking for, but the general idea is that the federal law will always reign supreme if there is ever a conflict between the federal and state laws. Federal law is superior or higher-ranking or more preferable, etc.
Here is the exact phrasing from Article VI of the US Constitution: "This Constitution, and the laws of the United States which shall be made in pursuance thereof; and all treaties made, or which shall be made, under the authority of the United States, shall be the supreme law of the land; and the judges in every state shall be bound thereby, anything in the Constitution or laws of any State to the contrary notwithstanding."
I would say it was based on the number 60 or 6. but im not sure since that was determined for the Babylonian mathematics <span />