Answer :
John F. Kennedy believed that an important responsibility for all Americans was to contribute to the defense of freedom and the success of liberty, regardless of personal sacrifice. He emphasized the importance of unity and collective effort in facing challenges, stating, "United there is little we cannot do in a host of cooperative ventures." Unlike his predecessors, Kennedy's policy goals focused on active citizen engagement and service to the nation. For example, he famously urged Americans with the memorable phrase, "ask not what your country can do for you - ask what you can do for your country," highlighting the call to personal responsibility and contribution to the greater good. Kennedy's emphasis on citizen involvement and sacrifice marked a departure from the more passive roles of previous administrations.