I don’t give it five stars because it needs way more love stories, well developed, these people don’t know how to act in love, they look like robots. and where’s the sex that people have in the wild at that age? they all seem like tormented, depressed robots jumping from one stressful situation to the next. Where is the tribal music, dances, games? I mean please send me to brazil, colombia, africa, or any island, anywhere but USA when the end of the world comes. there’s nothing good in their lives, why survive at all? Just to eat and kill the next? Its a replication of the reality of our overly industrialized world but with another topic. People in the wild at that age don’t behave like that. I give it 4 stars for imagination