MIL and SIL had this philosophical view - that they are the centres of their own separate universes and hence they should only try to perceive things from their own viewpoints (as they are incapable of fully perceiving things from other people's viewpoints). My DH was saying he doesn't think he is the centre of anyone's universe; he defines himself by the relationships he has with anothers i.e. I am his wife, hence his closest relative so if there is to be a centre in his universe, then I am the centre. I have a similar way of thinking. However my SIL says this is 'faux modesty' and that this is overthinking.
Btw this doesn't mean MIL and SIL only do stuff that is in their interests or are not emphatic. Their characters are different from their philosophy - they just use this view as their original starting point. They are adamant 'this is the truth '. I am just wondering how common this view is. I mean, I have read literature that western societies are much more individualistic but yet in UK, I have always felt people did prize community and relationships (they also did value personal space and independence!) Surely if you feel community is important, some part of you would be thinking in terms of the common good and hence you would not be the centre of your own universe by default?