Marjorie Kendig ( 1892 – 1981 ), probably Korzybski's closest co-worker, director of the Institute after his death, and editor of his posthumously published Collected Writings: 1920-1950, wrote in 1968: I would guess that I have known about 30 individuals who have in some degree adequately, by my standards, mastered this highly general, very simple, very difficult system of orientation and method of evaluating — reversing as it must all our cultural conditioning, neurological canalization, etc ....