Why isnt Gods Law eternal? Why do his laws seem to change whenever society changes in the bible?

God only has one law and that is Love the ten commandments were to show us how to love God and how to love each other these were the only laws put inside the ark of the covenant the other laws were put in place to get Israel through forty years in the desert and Christ nailed the law of sin and death to the cross and in God's kingdom we will be under the law of love as Micah 4:2 says "The law will go out from Zion, the word of the Lord from Jerusalem.