Utopia in general are a pretty dystopian genre. Plato's Commonwealth clearly describes a totalitarian system (and one of the participants in Socrates' dialogue would go on to murder a rather impressive number of Athenians).

More's Utopia describes a society that's not radically different from the State of Qin - a system based on uniformity, regimentation and forced labor. The main difference is that More would prefer enslavement as the principal punishment, while Shang Yang would prescribe execution.

I think that has something to do with the inherent hubris of the whole exercise.