In my opinion inheritance of wealth is not a right. Your wealth is your own and it's your decision what to do both when you're still alive, and when you're dead. If you decide to leave it to family members then whether they all get the same amount is also dependent upon your relationship with them and what you feel they deserve. To not give the same to a 'richer' grandchild as to a 'poorer' one may be justified in some situations, and not in others, for example if you have two children/grandchildren who have had the same chances in life and one has been sensible while the other's squandered those chances, what evidence do you have that the squanderer will not continue in that vein, and why reward that behaviour and penalise the sensible one? On the other hand, if one has a disability of some kind, that one might warrant more than one who isn't disabled. As far as estrangement goes, why on earth would you want to even remember someone who clearly doesn't want you in his/her life? What you do with your wealth after you've gone must be seen by the whole range of inheritors to be fair. I have friends whose child gradually became estranged after marrying a very jealous spouse who worked over a few years to make him cut off ties with his siblings as well. My friends have not seen one grandchild since it was just a few months old, and there's another one they've only heard about (never seen). Though they've continually made efforts to get back in contact they are always rebuffed and the dil gets in the way but frankly if the son can't stand up to her then he's as much to blame so how would their other children and grandchildren feel if the estranged son and his family were to be included in a will? It would be the same as them stealing wouldn't it?