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Well, in my views philosophy came first. Why? There are ways nature functions, philosophy helped us to form laws by looking at the way mother nature functions. But laws can be broken if a single discrepancy is found. Let's say tomorrow we discovered a device that breaks the first law of thermodynamics, then we may have to reformulate our existing laws. Natural laws are our ways of understanding how nature works.

Nature preceded philosophy given that man was the first material being to apply philosophy. Or, would it be more accurate to conclude that philosophy was discovered and employed by man rather than developed? Your conclusion that natural law has determined how we've created laws seems to be in conflict with man-made laws that seemingly contradict natural law, hence, various historical failures at the hand of bad policy. Maybe philosophy was embedded into nature and is inescapable.