How did Darwin respond to the criticisms that followed the publication of the Origin of Species? How did he revise his work while integrating feedback into his long argument? This chapter examines how Darwin structured counterarguments across various editions of OS, focusing on three key themes from Chapters 6 and 7: the challenge of intermediate forms, the utility and inutility of organs, and the role of natural selection in shaping intermediate organs. By analyzing Darwin’s engagement with critics, his incorporation of new research, and his strategies for addressing objections—particularly those raised by Mivart—we highlight his evolutionary gradualism and the gradual expansion of his theoretical framework toward a more pluralistic view of evolutionary processes.