“The most obvious example of natural law being alluded to is in the Preamble to the U.S. Declaration of Independence.”
“We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.”
To a believer, creator is God. To a non-believer, creator is nature. Who doubts that the statement is true? There is no worldly evidence to cite that proves that it is true or false or even true most of the time.
Here is another example from 20th century author, Upton Sinclair. Decades ago I figured out that human beings have trouble distinguishing between what is right and what they want.
Upton Sinclair makes a similar observation.
“It is difficult to get a man to understand something, when his salary depends on his not understanding it.” Upton Sinclair
Who has failed to notice that principle in play in these modern days? Did anyone notice doctors, hospitals, and other healthcare actors espousing the virtues of the whole country being vaccinated? Remember the few doctors who took exception? There were a few. Where are they now? Did anyone’s income depend upon promoting vaccinations? Do we know anything new about the vaccinations now than we did then?
There are no opinions with respect to natural law. There are observations. A person citing natural law can be wrong. We must ask, is that observation true or false?
Natural law has predominance over all man made laws that apply to any to human behavior. Take any popular theory. Find a conflict with natural law and you can throw it in the round file.