What was a significant aspect of the 1960s in motion picture history?

The 1960s in motion picture history is notably marked by filmmakers pushing boundaries regarding social norms and politics. This era witnessed a significant shift from the traditional Hollywood studio system, allowing for greater artistic freedom and more experimental storytelling. Filmmakers began tackling controversial subjects such as war, civil rights, sexuality, and counterculture, reflecting the social upheaval of the time. The emergence of the New Hollywood movement represents this change, as directors like Francis Ford Coppola, Martin Scorsese, and Dennis Hopper created works that challenged societal norms and offered commentary on the political landscape.

In contrast, the other choices do not accurately represent the character of the decade. The era was not known for a return to classic storytelling devoid of experimentation; rather, it was defined by innovation and a departure from established conventions. Likewise, the concentration solely on commercial success overlooks the artistic explorations and personal expressions that many filmmakers embraced during this time. Lastly, the dominance of silent films is a misconception, as the industry had long transitioned to sound films by the 1960s. Thus, the 1960s were prominently defined by a focus on pushing boundaries in both social and political realms.