“Satan hasn't a single salaried helper; the Opposition employs a million.”

Letter to The Black Commentator http://www.blackcommentator.com/47/47_cover.html (19 June 2003).
2000-03

Source: The Corporate Revolution in America, 1957, p. 288

Source: All the Light We Cannot See

Variants: One death is a tragedy. A million deaths is just a statistic.
A single death is a tragedy; a million deaths is a statistic.
When one dies, it is a tragedy. When a million die, it is a statistic.
In Портрет тирана (1981) (Portrait of a Tyrant), Soviet historian Anton Antonov-Ovseyenko attributes the following version to Stalin: "When one man dies it's a tragedy. When thousands die it's statistics." This is the alleged response of Stalin during the 1943 Tehran conference when Churchill objected to an early opening of a second front in France.<!-- The book appears to have a footnote sourceing the claim, but I couldn't access it. Could someone please try to scare up a paper copy and have a look at footnote 188? -->
In her review "Mustering Most Memorable Quips" of Konstantin Dushenko's 1997 Dictionary of Modern Quotations (Словарь современных цитат: 4300 ходячих цитат и выражений ХХ века, их источники, авторы, датировка), Julia Solovyova states: "Russian historians have no record of the lines, 'Death of one man is a tragedy. Death of a million is a statistic,' commonly attributed by English-language dictionaries to Josef Stalin."
This quotation may originate from "Französischer Witz" (1925) by Kurt Tucholsky: "Darauf sagt ein Diplomat vom Quai d'Orsay: «Der Krieg? Ich kann das nicht so schrecklich finden! Der Tod eines Menschen: das ist eine Katastrophe. Hunderttausend Tote: das ist eine Statistik!»" ("To which a Quai d'Orsay diplomat replies: «The war? I can't find it so terrible! The death of one man: that is a catastrophe. One hundred thousand deaths: that is a statistic!»")
Another possible source or intermediary may be the concluding words of chapter 8 of the 1956 novel The Black Obelisk by Erich Maria Remarque: "Aber das ist wohl so, weil ein einzelner immer der Tod ist — und zwei Millionen immer nur eine Statistik." ("But probably the reason is that one dead man is death—and two million are only a statistic." 1958 Crest Book reprint)
Mary Soames (daughter of Churchill) claims to have overheard Stalin deliver a variant of the quote in immediate postwar Berlin (Remembrance Sunday Andrew Marr interview BBC 2011) https://www.youtube.com/watch?v=9hP2tpw9XEw
See also Jean Rostand, Thoughts of a Biologist, 1939: "Kill one man, and you are a murderer. Kill millions of men, and you are a conqueror. Kill them all, and you are a god."
In an interview given for the 1983 three-part documentary Der Prozeß by Norddeutscher Rundfunk on the Third Majdanek trial, Simon Wiesenthal attributes the quote to the unpublished auto-biography of Adolf Eichmann. According to Wiesenthal, Eichmann had been asked by another member of the Reich Main Security Office during WWII what they should answer would they be questioned after the war about the millions of dead Jews they were responsible for, to which Eichmann according to his own testimony had replied with the quote.
Misattributed
Variant: The death of one man is a tragedy, the death of millions is a statistic.

Mock the Week

To B. A. Hinsdale in 1874, as quoted in The Life and Letters of James Abram Garfield: 1831-1877 (1925) by Theodore Clarke Smith, p. 517
1870s

Source: Orlando

University of Havana address (2005)
Context: Man is born egotistical, a result of the conditioning of nature. Nature fills us with instincts; it is education that fills us with virtues. Nature makes us do things instinctively; one of these is the instinct for survival which can lead to infamy, while on the other side, our conscience can lead us to great acts of heroism. It doesn’t matter what each one of us is like, how different we are from each other, but when we unite we become one.
It is amazing that in spite of the differences between human beings, they can become as one in a single instant or they can be millions, and they can be a million strong just through their ideas. Nobody followed the Revolution as a cult to anyone or because they felt personal sympathy with any one person. It is only by embracing certain values and ideas that an entire people can develop the same willingness to make sacrifices of any one of those who loyally and sincerely try to lead them toward their destiny.