Multiplcity is not limited to Western-European-derived civilization. So many of the forefathers of modern psychology were not even from English-speaking countries. And in English-speaking countries we're bound to run into people who are from other cultures, to whom we explain our western views of multiplicity and they're going to look at us funny and say "Why do you think this is a problem? Everyone in <my culture> is <their word for multiple>." LOL
Well, rather than be caught unawares, this manual is including a section on multicultural perspectives on multiplicity. If you have information about how another culture handles the issue, about other culture's philosophical, religious, or moral/ethical issues handling multiplicity, please let us know by adding something about it.