The high risk of disease among those at the bottom of the heap in both cases suggests that biochemical responses to low status affect a creature's immune system.
William is very proud and isn't big on talking - and being a wealthy and important man, he looks on someone from a lower status in society, such as Elizabeth's family, with contempt.
Research experiments in which strangers are assigned a high-status role and a low-status role and put in a room together have found that those placed in positions of authority help themselves to more biscuits than the others.
Compare yourself to people who are lower than you socio-economically, not in a superior manner, but in a way that gives you gratitude for the things that you do have in your life, that so many others do not.