Eight years of a John F. Kennedy presidency would probably have resulted in a lot of different outcomes than what we got under President Johnson. From Paul Craig Roberts at paulcraigroberts.org:
This Memorial Day, Monday, May 29, 2017, is the 100th birthday of John Fitzgerald Kennedy, the 35th President of the United States.
JFK was assassinated on November 22, 1963, as he approached the end of his third year in office. Researchers who spent years studying the evidence have concluded that President Kennedy was assassinated by a conspiracy between the CIA, Joint Chiefs of Staff, and Secret Service. (See, for example, JFK and the Unspeakable by James W. Douglass)
Kennedy entered office as a cold warrior, but he learned from his interaction with the CIA and Joint Chiefs that the military/security complex had an agenda that was self-interested and a danger to humanity. He began working to defuse tensions with the Soviet Union. His rejections of plans to invade Cuba, of the Northwoods project, of a preemptive nuclear attack on the Soviet Union, and his intention to withdraw from Vietnam after his reelection, together with some of his speeches signaling a new approach to foreign policy in the nuclear age (see for example, https://www.jfklibrary.org/Asset-Viewer/BWC7I4C9QUmLG9J6I8oy8w.aspx ), convinced the military/security complex that he was a threat to their interests. Cold War conservatives regarded him as naive about the Soviet Threat and a liability to US national security. These were the reasons for his assassination. These views were set in stone when Kennedy announced on June 10, 1963, negotiations with the Soviets toward a nuclear test ban treaty and a halt to US atmospheric nuclear tests.
The Oswald coverup story never made any sense and was contradicted by all evidence including tourist films of the assassination. President Johnson had ro cover up the assassination, not because he was part of it or because he willfully wanted to deceive the American people, but because to give Americans the true story would have shaken their confidence in their government at a critical time in US-Soviet relations. To make the coverup succeed, Johnson needed the credibility of the Chief Justice of the US Supreme Court, Earl Warren, to chair the commission that covered up the assassination. Warren understood the devastating impact the true story would have on the public and their confidence in the military and national security leadership and on America’s allies.
To continue reading: JFK at 100