Frogs in a well

Usually, I find that being well-educated and/or well-traveled makes people more open/large-minded, tolerant, patient, non-racist, non-nationalistic, peaceful, etc., and that being poorly educated and/or traveled makes people the opposite of those things. People who, mentally or physically, never go far from home usually seem to be the ones who are passionately attached to one (and against all others) religion, ethnic or national identity, sports team, local dialect of a language, and so on. A common metaphor for such people in south and southeast Asian countries is “frogs in a well.”