Instruct: Classify a given review into positive or negative sentiment.
Query: Is biology the only determinant of destiny?

This book really cops out by claiming every aggressive behaviour in boys is due to testosterone. Taken literally, this book says that our boys and men were healthier when they were little "Warriors", and bemoans the fact that our males lack this war-time outlet now. It is implied that without war-toys, etc., our boy children will be maladjusted. I think our young men today are pleasanter to be with than those of days past, and perhaps the author simply yearns for a return to HIS father's lifestyle.