In line with the spirit of May 1968 in France and widespread opposition to the U.S. involvement in the Vietnam war, he adhered to the unequal exchange and dependency theory, and came to sympathize with liberation movements and third world revolutions.
In the course of the early 1980s, however, Van Ginneken recognized that he had become too much of a fellow traveler, and returned to academic work in his original fields.
[6] He also completed a biography of Kurt Baschwitz: a Jewish- German- Dutch pioneer of communication studies and social psychology.
[8] Some of his further Dutch books dealt with mass psychology subjects such as behavioral economics and finance,[9] hidden persuaders,[10] and emotional contagion in large groups.
Next to his academic work, Van Ginneken always remained involved in a wide range of non-academic projects, for instance in science communication: for national events, major museums and prime-time television.