Genesis 3: 4-5 The KJV Bible

⁴ And the serpent said unto the woman, Ye shall not surely die:

⁵ For God doth know that in the day ye eat thereof, then your eyes shall be opened, and ye shall be as Gods, knowing good and evil.

Eve, the original black woman of the Holy Bible being made to know better than Adam, through a snake. 

Learning from a snake, how to rule over Adam, the original black man of the Holy Bible, by becoming 1 with the Most highest in wits and intelligence.

What is the first law of nature according to The KJV Bible ?

According to Genesis chapter 1: verse 28 of The King James Version Bible -

²⁸ And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth, and subdue it: and have dominion over the fish of the sea, and over the fowl of the air, and over every living thing that moveth upon the earth.

Here, the first law of nature is found in the form of human being procreation. 

Also the law of survival of the fittest.