what dictates "higher psychological boundaries"? I disagree with your implication that it is an environment based thing. There are those who intrinsically question their upbringing and those who do not. What gives people these different characteristics? That I can't define, but history has proven that there are many exceptions to all the psychological "rules". This shows me that it's not really about how you are raised (although some can be trained to have a lower psychological boundary as well as a higher one, i suppose), but more about what drives you individually as a person.