"Today we know that World War II began not in 1939 or 1941 but in the 1920s and 1930s, when those who should have known better persuaded themselves that they were not their brother's keeper"
About this Quote
The subtext is moral and pointedly American. “Those who should have known better” is a polite phrase that lands like an indictment: elites, democracies, institutions built to anticipate danger. Humphrey’s biblical turn - “not their brother’s keeper” - is doing heavy rhetorical lifting. It frames isolationism and appeasement not as strategic miscalculation but as a failure of basic ethical obligation. He’s not arguing over tactics; he’s arguing over character.
Context matters: Humphrey was a Cold War liberal who believed international engagement was a test of democratic seriousness. Read against the postwar insistence of “never again,” the quote warns how “again” happens: not with sudden invasions, but with years of rationalizations, selective empathy, and the easy fiction that borders can quarantine moral responsibility. It works because it converts history into a live standard for policy. The past becomes less a lesson and more a mirror, implicating any era that congratulates itself for staying out of trouble while trouble is gathering speed.
Quote Details
| Topic | War |
|---|---|
| Source | Help us find the source |
| Cite |
Citation Formats
APA Style (7th ed.)
Humphrey, Hubert H. (2026, February 16). Today we know that World War II began not in 1939 or 1941 but in the 1920s and 1930s, when those who should have known better persuaded themselves that they were not their brother's keeper. FixQuotes. https://fixquotes.com/quotes/today-we-know-that-world-war-ii-began-not-in-1939-144156/
Chicago Style
Humphrey, Hubert H. "Today we know that World War II began not in 1939 or 1941 but in the 1920s and 1930s, when those who should have known better persuaded themselves that they were not their brother's keeper." FixQuotes. February 16, 2026. https://fixquotes.com/quotes/today-we-know-that-world-war-ii-began-not-in-1939-144156/.
MLA Style (9th ed.)
"Today we know that World War II began not in 1939 or 1941 but in the 1920s and 1930s, when those who should have known better persuaded themselves that they were not their brother's keeper." FixQuotes, 16 Feb. 2026, https://fixquotes.com/quotes/today-we-know-that-world-war-ii-began-not-in-1939-144156/. Accessed 18 Feb. 2026.



