Thanks to President Kennedy, We the People accomplished what had previously been considered impossible -- voyaging to the moon and back.
The manned space program resulted in great jobs on earth, from prime contractors to sub-sub-sub contractors to the barkeeps in Boca Raton.
The program resulted in great advances in technology for people on earth, from the computer on which you read this to the materials used to keep hearts healthy.
The peaceful exploration of space showed the world that free people working together can do anything.
Imagine what we could do if we applied that kind of attitude to the problems on earth?
PS: Thank you, LongTomH, for an outstanding OP.