It is overthrown by the second revolution in early All of the scientific principles embodied in the Covenant which marked the end of the revolution were formulated as far back as the first quarter of the twentieth century. But the work of the pioneer semanticists, C. Ogden in England and Alfred Korzybski in the United States, were known to but a handful of students, whereas psychodynamics, under the impetus of repeated wars and the frenzy of high-pressure merchandising, progressed by leaps and bounds.