Desmond and Moore’s Darwin’s Sacred Cause

In their book Darwin’s Sacred Cause (2009) Adrian Desmond and James Moore purport to demonstrate that they have provided an original explanation for the inspiration behind Darwin’s determined pursuit of an explanatory theory for the transformation of species of which he became convinced as a result of his experiences during the Beagle voyage of 1831 to 1836. This, they argue, was the “moral passion†that was evoked by his encountering the horrors of slavery during the periods he was able to disembark to explore areas of South America in the years 1832 to 1835. In short, they provide what they describe as “the untold story of how Darwin’s abhorrence of slavery led to our modern understanding of evolution.†This article explores the means by which the authors seek to persuade readers of the validity of their thesis, and concludes that far from providing compelling evidence, by providing a mass of historically interesting material relating to slavery that is actually tangential to their case, they obscure the fact that they fail to accomplish their aim. There is nothing in their account of events that provides a reason for preferring their explanation for Darwin’s devotion to understanding the processes involved in the transformation of species to the known historical facts of Darwin’s early zeal for natural science, exhibited in his childhood exploits with beetles and his more organized scientific activities when he was a student at Cambridge, enabled to come to fruition by his scientific activities during the voyage of the Beagle .