But how can we differentiate between legal law and the theory law such as "Law of Leadership", "Law of Love"? Those "laws" were just a rules that guide people to do something but not legal regulations that set by government. Another example that can make us more clear about law is culture, social tradition norm are not a law. People won't get fine or send to jail if do something that oppose with the culture or norm.
Beside that, every law must be white and black. But sometimes that's some unwritten law can be enforce too.
The main objective of law is to control human behaviour. The laws can be enforce by the enforcement agency, Polices of every country.
