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A scientific study has discovered that, compared to Omnivores, Vegans and Vegetarians show higher activation of empathy related brain areas (e.g. Anterior Cingular Cortex and left Inferior Frontal Gyrus) when observing scenes of suffering; whether it be animal or human suffering.
Bottom line is, if you became veg*n for ethical reasons, it's because you were born that way. Choice had little or nothing to do with it.