" Nationalism, originally a progressive movement, replaced the bonds of feudalism and absolutism. The average man today obtains his sense of identity from his belonging to a nation, rather than from his being a "Son of Man." His objectivity, that is, his reason, is warped by this fixation. He judges the "stranger" with different criteria than the members of his own clan. His feelings toward the stranger are equally warped. Those who are not "familiar" by bonds of blood and soil (expressed a common language, customs, food, song, etc.) are looked upon with suspicion, and paranoid delusions about them can spring up at the slightest provocation. This incestuous fixation not only poisons the relationship of the individual to the stranger, but to the members of his own clan and to himself. The person who has not freed himself from the ties to blood and soil is not yet fully born as a human being; his capacity for love and reason are crippled; he does not experience himself nor his fellow man in their-and his own-human reality. "

― Erich Fromm