The phrase and the concept were popularized by [[Henry David Thoreau|Thoreau]]'s famous essay, ''Civil disobedience.''
The phrase and the concept were popularized by [[Henry David Thoreau|Thoreau]]'s famous essay, ''Civil disobedience.''
+
+
The concept of civil disobediance became a cornerstone of the American civil rights movement in the 1960's, as African Americans openly but peacefully defied segregation laws.