This book is more complexe than all the stories I always heard about it, and it gets into the part of the Apes, and this is very interesting. I mean, how a human baby that have grown without any ethic can be moral? Burroughs wants to make his little boy to be a "perfect" example of human being, or something like that. Note that perfect is not the meaning of "very good". In a chapter, we subtle know that Tarzan kills sometimes not for hunger, or for saving his life, he kills for pleasure. Not animal does that.