Of all the women who passed into and out of JFK's life, the only one, by many accounts, that he ever showed more than the passing itch for (besides his wife) was Mary Pinchot Meyer, the aristocratic divorced wife of high level CIA agent Cord Meyer. Possibly it was because, out of all of them, she was his intellectual equal. After her marriage to CIA man Meyer fell apart in the wake of the death of their son, Mary took on the lifestyle of a proto-flower child--art, incense, peasant blouses, pacifist politics, dope, sheltered by her privileged Georgetown lifestyle. Apparently all this held some fascination for Kennedy. The really interesting thing that was going on here was her apparently simultaneous connection with JFK and Prof. Timoth Leary of Harvard who was in the middle of the acid experiments that would ultimately get him fired.
From Wikipedia:
"In 1983 [Leary] claimed that in the spring of 1962 Meyer, told him she was taking part in a plan to avert worldwide nuclear war by convincing powerful male members of the Washington establishment to take mind-altering drugs, which would presumably lead them to conclude the
Cold War was meaningless. Meyer said she had shared in this plan with at least seven other Washington socialite friends who held similar political views and were trying to supply LSD to a small circle of high ranking government officials. Mary Meyer and John F Kennedy reportedly had "about 30 trysts" and at least one author has claimed she brought marijuana or LSD to almost all of these meetings, the acid mostly supplied by Leary who was intrigued by Meyer's project."
It was during this time that Kennedy biographer
James W. Douglass, says that Kennedy was undergoing a "conversion process" triggered by his confrontation with the real horror of nuclear war during the Cuban Missile Crisis, a process that eventually resulted in his
"American University Speech" where he in effect proposed the dismantling of the Cold War status quo.
Was some of this reinforced by Mary Meyer and her Leary-supplied acid?
Meyer's biographer speculates that, "Mary might actually have been a force for peace during some of the most frightening years of the cold war..."
In his biography
Flashbacks Leary claimed he had a call from Mary soon after the Kennedy assassination during which she sobbed and said, "They couldn't control him any more. He was changing too fast. He was learning too much... They'll cover everything up. I gotta come see you. I'm scared. I'm afraid."
Not long after, Mary Meyer was murdered in what some call "execution style" while walking along the Potomac Towpath in Georgetown. The man acused of the murder was acquitted and no-one else has ever been arrested for her murder. Immediately after her death high level officials of the CIA searched her apartment and apparently made off with her diary, which was never seen again.
For more on Mary Meyer, see her biography,
A Very Private Woman, by Nina Burleigh.