What was a significant underlying cause of the cultural changes observed during the 1960s counter-culture movement in the United States?

A significant underlying cause of the cultural changes during the 1960s counter-culture movement in the United States was the growing discontent with traditional values and societal norms. Many young people began to question authority and the status quo, especially in response to the Vietnam War and civil rights issues. This questioning led to a desire for freedom of expression, peace, and love, which was reflected in music, art, and fashion. For example, festivals like Woodstock in 1969 became symbols of this movement, showcasing a community that embraced new ideas about life and relationships. Overall, the counter-culture movement represented a shift towards seeking personal and social liberation, influencing many aspects of American life.