“I suggest you consult Wikipedia. MLK was assassinated on April 4, 1968. NOT in the period being celebrated. The counter-culture that the article deplores was in just about full swing.”
Sigh… “These basic cultural precepts reigned from the late 1940s to the mid-1960s”. So we can argue whether April 68 was close enough to qualify as mid 1960s, or I can simply ask if you got the point I was making.