Crake’s goal of creating “the new human race” creates a race which resembles humans, but is so different that they are obviously a different species, inside and out. Crake’s new species of people include everything which they could biologically need to survive, including UV resistant skin, heightened immunity, and insect repellent build into their systems. However, as Crake goes on, what they won’t have starts to come out:
“…as there would never be anything for these people to inherit, there would be no family trees, no marriages, and no divorces. They were perfectly adjusted to their habitat, so they would never have to create houses or tools or weapons, or, for that matter, clothing. They would have no need to invent any harmful symbolisms, such as kingdoms, icons, gods, or money. Best of all, they recycled their own excrement…” (page 305).
Crake is proud of himself here for eliminating what he deems humanity’s most harmful and self-destructive traits, but here he’s deemed all human culture and society harmful and superfluous, disregarding any arguments for the good those things bring. Gods can give people comfort and houses are useful for both storage and shelter, but Crake believes that his new species doesn’t need any of these things and doesn’t deign to give them to the Crakers.
This makes it almost more tragic that Snowman is the one Crake tells to take care of the Crakers. Snowman’s life has been focused on the arts and human culture, learning Shakespeare and the classics as a big part of his schooling. Crake didn’t care for any of that, but he knew that Snowman’s sentimentality would lead him to protect his new species of super-non-humans. Snowman is lost in this new world created by Crake, but he holds on to what he knows and out of spite passes what he can down to the Crakers, so that they won’t lose all culture forever.