Nietzsche argued that there were two fundamental types of morality: 'Master morality' and 'slave morality'. Slave morality values things like kindness, humility and sympathy, while master morality values pride, strength, and nobility. Master morality weighs actions on a scale of good or bad consequences unlike slave morality which weighs actions on a scale of good or evil intentions.
In my opinion the effort of Nietzche of splitting the world in a dichotomy is really interesting for science and applied psychology. Since, if the master morality, doesn't have to deal with empathy it should follow that it's more based on competition.
So it should be really useful for describing the beliefs of nations like Japan, USA or China (competitive, less assistentialistic) while the slave morality should fit more countries with a strong influence of church.
Did someone continue the studies of Nietzche from a Psychological point of view?