If you want to see something he did for our country, and the world, just look at how you are able to communicate these ideas and discussions with people all over the world from the comfort of your own home. The basic technology which led to the personal computer, cell phones, medical technology, etc., etc., etc. all have their bases in the space program. It was Kennedy who propelled NASA from a sideline of the Defense Dept. to one of the most successful government agencies in history. If for no other reason, that makes Kennedy's presidency a success.