common cause

Idioms  

1. A joint interest, as in “The common cause against the enemies of piety” (from John Dryden's poem, Religio laici, or a Layman's Faith, 1682). This term originated as to make common cause (with), meaning “to unite one's interest with another's.” In the mid-1900s the name Common Cause was adopted by a liberal lobbying group.

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Example Sentences

When they occur, investigators usually search for a common cause - fuel contamination, a disruption in fuel supply, bird strikes, volcanic ash or some broader system failure.

From BBC • Jun. 15, 2026

Many Arab countries once saw Israel as a potential partner making common cause against Iran, and some have quietly coordinated on security matters for years.

From The Wall Street Journal • Jun. 1, 2026

Exercising some muscles while ignoring others is a common cause of injury, and any trainer worth their salt will advise fitness enthusiasts to balance their routine.

From Salon • May 8, 2026

While viral infections are the most common cause in the United States, bacteria, parasites and fungi can also cause the condition.

From Los Angeles Times • Apr. 28, 2026

“Why not make common cause with him against the Lannisters?”

From "A Dance with Dragons" by George R. R. Martin