“How is it these devices succeed so well in rousing men to such wild enthusiasm, even to sacrifice their lives? Only one answer is possible. Because man has within him a lust for hatred and destruction. In normal times this passion exists in a latent state, it emerges only in unusual circumstances; but it is a comparatively easy task to call it into play and raise it to the power of a collective psychosis.”

Albert Einstein

~ Albert Einstein
(1879-1955) Physicist and Professor, Nobel Prize 1921
Einstein letter to Sigund Freud, Caputh near Potsdam, 30 July, 1932
https://courier.unesco.org/en/articles/why-war-letter-albert-einstein-sigmund-freud