Why are the laws of different States in the United States different?

Judging from the founding history of People's Republic of China (PRC), the sovereignty of North America was obtained according to the principle of theological contract pursued by European countries at that time, that is, any Christian royal family has the right to declare its sovereignty as long as it finds the land occupied by so-called pagans and barbarians. Before the founding of the People's Republic of China, except for a few sites that were won by the British using state power (for example, for the new Amsterdam, that is, new york), the rest were originally run by private consortia, such as Virginia or Virginia companies. Social infrastructure below the state level is organized by immigrants, and settlement construction, power distribution, public affairs decision-making, industrial assembly, etc. are handled according to local geographical conditions through the principle of public. According to edmund burke's definition, the basic social structure of the United States is "self-organization", and the war of independence is defined by this conservative as a war to maintain self-organization against the tax laws and garrison of sovereign countries. From the perspective of historical materialism, the decision-making body of the War of Independence, the Continental Congress, is essentially a decision-making body composed of self-organized bodies and representatives of the exclusive class, calling on their respective organizations to unite and face the same enemy, and because of the same language and close geographical location, it began to form a short-term isomorphism of * * *. However, after the war of independence, in the early days of the Federation, it was established as a representative institution to deal with some public affairs. At this time, it was more of a confederate state. At the Philadelphia Conference before the American Constitution, anti-federalists headed by Patrick Henry quarreled with federalists (the main goal was Hamilton (who was supported by prestigious Washington and Madison from Virginia)), and finally reached a compromise on the Tenth Amendment to the American Constitution. The Constitution does not grant the power to the United States, nor does it prohibit States from exercising it. It is strictly reserved for States or people. The powers that the Constitution does not grant to the United States or prohibit States from exercising shall be reserved by States or people. From here on, the boundary between federal legislative power and state legislative power was established. Of course, this legislative thought is also greatly influenced by Adams' and systematic exposition.