It was this sort of careful science starting with a scientifichypothesis, following it up with observations in the field and ending with clinical trials which proved that circumcision protects against infection.
At first embraced by the New Age and environmental movement but almost totally ignored by the scientific community, the essential truth of the Gaia hypothesis -- that the Earth regulates itself -- has since been adopted by the scientific mainstream.
But the best science books are those that most clearly adhere to scientific principles themselves: they present a hypothesis, examine the data, and leave readers to conclude what they will.
There is no such thing as testing the climate change hypothesis under repeatable conditions and getting repeatable results, yet the scientific method demands this.