Christopher Hitchens writes in Letters to a Young Contrarian,

We are an adaptable species and this adaptability has enabled us to survive. However, adaptability can also constitute a threat; we may become habituated to certain dangers and fail to recognize them until it’s too late. Nuclear armaments are the most conspicuous example; as you read this you are in effect wearing a military uniform and sitting in a very exposed trench. You exist at the whim of people whose power does not derive from your own consent and who regard you as expendable, disposable. You merely failed to notice the moment at which you were conscripted. A “normal” life consists in living as if this most salient of facts was not a fact at all.