An Analysis of The Descent of Man and Selection in Relation to Sex.
In the paragraph quoted from Charles Darwin's The Descent of Man and Selection in Relation to Sex, Darwin presents the theory that regardless of how far man has come, or how far, still, man aims to go, man will always be reminded, through his physiology, of where he has come from. To paraphrase, Darwin is saying that, because man clearly stands at the top of the food chain, it is only natural for him to feel a sense of innate superiority to all other life on the planet. What's further, the fact that man has achieved his standing gradually, over time, gives man reason to believe that he has the potential to continue that advancement to even greater heights at some point in the future.