William McDougall,
The Group Mind: A Sketch of the Principles of Collective Psychology
“ This doctrine of the ‘collective consciousness’ of societies may seem bizarre to those to whom it is altogether novel; but it is one that cannot be lightly put aside; it demands serious consideration from any one who seeks the general principles of Collective Psychology. We have no certain knowledge from which its impossibility can be deduced; and the new light thrown upon individuality by modern studies in psycho-pathology shows us that the indivisibility and strictly bounded unity of the individual human soul is a postulate that we must not continue to accept without critical examination. ”
