If you do not study the history of the law may result in the law clearly does not understand. Use a law intended and interpreted the law to come out until the trouble others.
If you study the history of law May not fully understand the law. Using the wrong legal purposes And incorrect interpretation of the law until approximately the suffering of others up.
If you don't study history of law. May make to understand in the law perfectly. Use the law of fault point. Interpretation of law and cause trouble to others to make error.