One aspect that I can see being particularly troublesome is the "closely guarding their resources and distrusting strangers." I'm sure those traits were develop

One aspect that I can see being particularly troublesome is the "closely guarding their resources and distrusting strangers." I'm sure those traits were developed with good reason, but it can make forming relationships very difficult with the kind of personality that is by nature welcoming and trusting. While I would never describe that mindset as barbaric, it is true that I would like to see societies move toward an ideal where trust and generosity are the norm.