Laws and Rules are extremely necessary in a society. This is because laws and rules define what is right and what is wrong. These rules and laws protect and also endorse the rights of individuals.
In a place where there are no laws or rules, people tend to take the rights of other people. This is because humans are greedy by nature. And their greed compels them to take what is not there.
So, for smooth running of the society, rules and laws are essential.