From The Screwtape Letters: Letters from a Senior to a Junior Devil, written as a weekly newspaper column in 1941 and published in book form in 1942:
The whole philosophy of Hell rests on recognition of the axiom that one thing is not another thing, and, specially, that one self is not another self. My good is my good and your good is yours. What one gains another loses. Even an inanimate object is what it is by excluding all other objects from the space it occupies; if it expands, it does so by thrusting other objects aside or by absorbing them. A self does the same. With beasts the absorption takes the form of eating; for us, it means the sucking of will and freedom out of a weaker self into a stronger. “To be” means “to be in competition”.
Lewis puts these words in the mouth of his character Screwtape, a senior devil instructing his nephew on how to undermine a human’s progress as a Christian and as a person. They are intended to be too ludicrous to be taken seriously as anything but a satire of the most destructive and appalling philosophies on the market.
Yet somehow this has become completely conventional mainstream political theory in the UK, and now governs everything from how our universities and funded to the progressing privatisation of the NHS.