There are several situations where a minority group stood up against the dominant group. One of the more famous examples is the Black Lives Matter movement. It is an international activist movement that advocates the protection of African-American against oppression and discrimination.
The assassination of John F. Kennedy on November 22, 1963 lead to the Vice-President Lyndon Johnson becoming president of the United States, Johnson continued Kennedy's civil rights program and escalated the war in Vietnam. Elected in 1964 in his own right, he did not run again in 1968 because of opposition to the Vietnam War.