How do you know what is "good or bad for the species" without a definition of good or bad yet? In any event, "what is good or bad for the development of the species" is ultimately a philosophical question, incapable of being quantified. This is a pretty poor attempt to define good and evil.
And that is how you come to tossing malformed babies and the infirm off of cliffs. Indeed, it is exactly how the NAZI's defined good and evil, based on what was best for "their" species.
But then I guess he has a motive as his latest book suggests - HE HATES ALL RELIGION."
Hitchens is not that hard to understand. Hitchens is a homo. But he is not a stupid homo. He hates religion and G-d because he thinks, falsely, that their admonition against his sexual predilection are why he is so angry and unhappy. But he also sees the communist left for the murderous fanatics they are. Hitchens is no more complicated than that.