In "The Island of Doctor Moreau," H. G. Wells explores the conflict between scientific ambition and ethical considerations. The narrative raises questions about the moral implications of scientific research, especially when it clashes with human conscience. This tension between progress and morality is a recurring theme, as characters grapple with the fallout of their experiments and the nature of humanity.

The quote highlights a crucial moment where the protagonist reflects on the darker side of scientific inquiry, emphasizing that ethical dilemmas are not new in the realm of research. Wells suggests that, throughout history, the methods employed in the name of science have often faced scrutiny and condemnation from the conscience, reminding readers of the importance of balancing innovation with ethical responsibility.