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“Anxiety and fear are emotions. Emotions exist only because they have given selective advantages. This makes it tempting to try to define different emotions in terms of their functions. Fear protects against present danger, anxiety against possible dangers. However, defining emotions in terms of their functions risks tacit creationism: the tendency to view bodies as if they are machines.”
― Riadh Abed, Evolutionary Psychiatry: Current Perspectives on Evolution and Mental Health

“Everyone knows that the environments we created to satisfy our wishes for sweets, salt, fat and leisure have resulted in epidemics of chronic disease. Obesity and eating disorders are prime examples, but alcoholism and drug addiction are also made possible by ready access to substances and means of administration that have only recently become available. Lack of selection until recent times against these often fatal disorders is an essential part of any evolutionary explanation.”
― Riadh Abed, Evolutionary Psychiatry: Current Perspectives on Evolution and Mental Health