Sándor Ferenczi

“According to the teachings of the materialistic idea of history they could have set up the new social order immediately after they had got the entire power into their hands. Instead of this, irresponsible elements, which were antagonistic to any new order of things, obtained the upper hand, so that the power gradually slipped from the hands of the originators of the revolution. Then the leaders of the movement put their heads together in order to find out what had gone wrong in their calculations. Finally they agreed that perhaps the materialistic idea was after all too one-sided, as it only took into consideration the economic and commercial relations, and had forgotten to take into account one small matter, the feelings and thoughts of man, in a word, the psyche. They were sufficiently consistent to send emissaries immediate to German speaking countries, in order to obtain psychological works, so that they might get at least subsequently some knowledge of this neglected science. Many thousands of human lives fell victims, perhaps to no purpose, to this omission of the revolutionaries; the failure of their efforts resulted in their making one discovery however, namely, that of the mind.”
― Sándor Ferenczi, Psycho-Analysis and the War Neuroses