People who live in bubbles. People who don’t know they live in bubbles. People who don’t care they live in bubbles. People who deny they live in bubbles. People who hang out with people who agree with them. People who don’t travel outside the confines of their own minds. People who don’t travel outside the confines of their own habits. People who don’t travel outside the confines of their own culture. People who travel outside the confines of their own culture and compare everything with the culture they stepped out of. People who are uncomfortable being outside their own culture. People who can’t wait to get back to the familiarity of their own culture. People who can’t change their minds. People who won’t change their minds. People who don’t like their faith in the reality they’ve constructed for themselves being even mildly shaken. People who aren’t up for revising their most cherished beliefs.