The Cruel Science tells the story of animal research from ancient times to the present. It discusses Aristotle influence in its evolution and the major role Christianity has unwittingly played in creating the attitudes upon which animal research depends. The book exposes the probable responsibility of animal research for the AIDS epidemic and many forms of cancer and how the industry has invented a perpetual money producing machine that bilks the public out of billions of dollars every year for needless, senseless experiments that are often exceptionally cruel.