Lois Lowry's The Giver seems an anesthetized version of Aldous Huxley's Brave New World, a dark satire that warns that if science becomes an instrument of power and is applied to people, it will produce a horridly changed society. The society of Lowry's little narrative, much like the New World of Huxley's novel, values the same things that the Hatchery has over its doors in Brave New World:
Stability, Community, Identity and for the same reasons: control of its citizens.
I will go one step further as far as control goes- I think the society values CONTROL in general. Not only is the population controlled, but many aspects of the life of the community are controlled- who one may "marry," the career path one will take, etc. Even sexual feelings are attempted to be controlled as well.
It is amazing to me that the people of this society go along with this, and allow themselves to be controlled.
A significant value is that of population control; the government understands that a closed society cannot have uncontrolled procreation, and so they limit births and euthanize citizens at a certain age. This allows the society to remain stable instead of overpopulating.
Sameness is used in the book to describe their society. Same bikes, same clothes, same everything. Only the memory keeper is able to see colors and know the memories of what made them different. The want to keep the memories (just not accessible to everyone) so that they can have them available if anyone should suggest why to not have "sameness".
The society also values conformity. Children of a similar age are all dressed the same; family units are made up of one man, one woman, and no more than two children (one of each sex); while it's not specifically addressed in the book, I'm guessing each family unit's housing is very similar to every other family unit's living quarters.
The society in this book values stability. They want everything to be totally predictable. They don't want anything to cause conflict in their society. Therefore, they don't want anything like human emotion or even like weather that could be unpredictable and cause conflict.