It is comparatively easy to get a penal statute on the books. It is very hard to get it repealed. Men are lazy and cowardly; politicians look for votes; members of legislatures and Congress are not so much interested in finding out what should be done, as they are in finding out what the public thinks should be done. Often a law lingers on the books long after the people, no longer believing the forbidden thing to be wrong, have repealed it. The statute stays, to be used by mischievous people and by those who believe in the particular law.  
Often the unthinking lay hold of a catch-word or a pet phrase and repeat and write it, as if it were the last word in social science and philosophy. General Grant, when president, stumbled on such a silly combination of words, and surface-thinkers have been repeating it ever since, simply because it sounds wise and pat. Grant once said that, "The way to repeal a bad law is to enforce it." Grant was not a statesman nor a philosopher. He was a soldier. He probably heard some one use this phrase, and it sounded good to him. Out of that has grown the further statement which courts and prosecutors have used to excuse themselves for the cruelty of enforcing a law that does violence to the feelings of the people. This statement is to the effect that so long as the law is on the books, it is the duty of officers to enforce it. The smallest investigation of the philosophy of law shows how silly and reactionary such statements are.
 
One thing should be remembered. Laws really come from the habits, customs and feelings of the people, as interpreted or understood by legislative bodies. When these habits and customs are old enough they become the folk-ways of the people. Legislatures and courts only write them down. When the folk-ways change the laws change, even though no legislature or judge has recorded their repeal.
 
Since Professor Sumner of Yale University wrote his important book, "Folkways," there is no excuse for any student not knowing that this statement is true. As a matter of fact, no court ever enforced all the written laws, or ever would, or ever could. Only a part of the discarded criminal law is ever repealed by other laws. The rest dies from neglect and lack of use. It is like the rudimentary parts of the human anatomy. Man's body is filled with rudimentary muscles and nerves that, in the past, served a purpose. These were never removed by operations, but died from disu............