Friedrich Engels in his book The Condition of the Working Class in England

“When society places hundreds of proletarians in such a position that they inevitably meet a too early and an unnatural death… its deed is murder just as surely as the deed of the single individual; disguised, malicious murder, murder against which none can defend himself, which does not seem what it is, because no man sees the murderer, because the death of the victim seems a natural one, since the offence is more one of omission than of commission. But murder it remains.”