There is also a pecking order for those who can kill another inmate, but the target has to be justified as either an undesirable, such as a nonce(short for nonsense eg: sex-crimes and granny bashers) or it has to be another dangerous inmate, if an inmate can get a notorious killer then it all adds to his kudos, hence one inmate tried to kill Peter Sutcliffe with felt tip pens, and succeeded in inflicting serious injury by stabbing him through the eyes.
Inmates who are never going to be released enjoy the status that they have through having nothing to lose.
Among the lowest of the low are hard drug users(smackheads), since they can be basically bought and sold by other inmates for almost any task, and they are also the ones most likely to steal from other inmates, default on debts, or they may seek protection from other inmates they owe out to ,by offering information to staff, in exchange for a prison transfer.
In the UK armed crime is relatively rare compared to other offenders, those who target security vans, wages snatches and the like, these are pretty near the top of the heap.
We do have serious organised criminals in our higher grade jails who try to control things, and in the past prison staff have fallen into the trap of allowing such individuals help keep things operating smoothly.
I would agree that prisoners seem to have a need to look down on others, their world is filled with percieved injustices, paranoia, petty hatreds, self-justification, jealousy, envy and competition.
Yet underneath this there can be acts of huge generosity, great loyalty, companionship and shared dependancy.
In some ways ‘Lord of the flies’ applies well to many inmates not just in their amorality, but in a lack of education and immaturity, many inmates seem to have the education and emotional level of a thirteen year old.