When Kennedy mentions "those who came before us" he is referring to other great leaders throughout American history other great
leaders throughout American history our forefathers who founded the United States our forefathers who founded the United States other presidents other presidents scientists like Newton and Galileo
When Kennedy says "those who came before us" he is referring to great American leaders inserted in the most diverse branches of industry, politics and science. Kennedy claims that it was these great leaders who allowed the United States to receive a wave of industrialization that promoted the country's advance and it was the duty of future leaders and Americans in general, not to allow these advances to go back, but to go even further.
