the other conflict that is shown is the muggle/wizard - where you have a full spectrum - from muggles who are totallly unaware of wizards - to those who are aware and to some extent follow what is happening in the wizarding world (examples would be Hermione's parents - based on comments she makes) to muggles who mix with wizards - becoming friends, marrying, etc. - to those who are aware of wizards and activly ignore or avoid them (the dursleys) - plus the full spectrum of wizards - from those for whom anything other the "pure-blood" is anaethma - to those more or less raised as muggles -

plus of course the whole "half-blood" bit with giants, veela's and possibly other races/species of magical creatures.

then you have the "squibs" - essentially muggles born to wizardly parents - some of whom live in wizard society - some of whom live in muggle society -