[dragonwriter]

Right, all those things are different ways of saying wealth.

The implication made uphtread is that the rich were best in terms of (lower) intrafamilial conflict. One might assume that wealth produced that effect, one might also assume that the rich were more dependent on social status and property for support, while the poor were more dependent on having close relations who could give aid and lacked assets to fight over, thus leading to less intrafamilial conflict than among the rich.