“Tying morality to religion is a little like transporting a precious cargo on a sinking ship. What happens when the child grows up and starts doubting the factual claims of the religion? The cargo may be lost with the ship.”
Source: Darwin, God and the Meaning of Life: How Evolutionary Theory Undermines Everything You Think You Know (2010), p. 287
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1971Related quotes

“If it's sent by ship then it's a cargo, if it's sent by road then it's a shipment.”
Compilation by the BBC 11 March, 2005 http://news.bbc.co.uk/1/hi/entertainment/film/4340205.stm

Undelivered Trial Summation
Scopes Trial (1925), Summations

'On November 2, 1943, J.R.D. Tata spoke to the Bombay Rotary Club.
Keynote: Excerpts from his speeches and chairman's statements to shareholders

“Watch the little things; a small leak will sink a great ship.”

Source: Writings, Politics of Guilt and Pity (1978), p. 25

I think unconsciously that started me thinking of them as cargo.
About the victims. Quoted in "Good and Evil After Auschwitz: Ethical Implications for Today" - Page 96 - by Jack Bemporad, John Pawlikowski, Joseph Sievers - History - 2000.

Quoted in The American Mercury (1961), in a letter from Cleveland to his law partner, Wilson S. Bissell, February 15th, 1894. https://books.google.com/books?id=BIsqAAAAMAAJ&q=%22The+present+danger%22+cleveland+bissell&dq=%22The+present+danger%22+cleveland+bissell&hl=en&sa=X&ved=0ahUKEwj68-CIhenSAhXpCMAKHdsXCKQQ6AEIHjAB.

“407. A small Leak will sink a great Ship.”
Compare Poor Richard's Almanack (1745) : Beware of little Expences, a small Leak will sink a great Ship.
Introductio ad prudentiam: Part II (1727), Gnomologia (1732)