They began in England. Today the term refers to laws that are fundamental to democracy. Under martial law, military laws are followed instead of civil laws. The law of one's conscience. No one is sure who Murphy was, but these laws are well known.
Nothing is as easy as it looks.
Everything will take longer than you think. If anything can go wrong, it will. In times of frustration, people will often remark that things are going according to Murphy's laws. A large number of people accomplish less work than a smaller number of people. All Rights Reserved worldwide.