One of the biggest errors of modern time is a misplaced faith in laws. It is thought that the right laws can do everything from taming the power of the US to improving the status of woman. But the truth is that laws do not create society, society creates laws. The power of a law nessearly stems from the values that make up a society. As a consequence, laws that are not based on values common to a society will only create widespread lawlessness. In other words, without a society based on common values, laws are useless.
This truth is ignored by many people who think that if they can only get the right laws passed, then society will be so much better. Such people would do well to read this essay from the Belmont Club exploring the consequences of trying to make enforce a common law were there is no common society.