Mood modifiers have been used from time immemorial, caffeine, alcohol, nicotine, immune system enhancement, vision enhancement, anesthetics, we take that very much for granted, but just think about how great progress that is, like, having an operation before anesthetics was not fun.
Se han usado modificadores del ánimo desde tiempos inmemoriales, cafeína, alcohol, nicotina, reforzadores del sistema inmune, reforzadores de la vista, anestecias. Damos a esas cosas por hecho, pero sólo piensa cuan gran progreso eso es, por ejemplo, tener una operacion antes de la anestecia no era divertido.