Definitions
It is perhaps necessary to provide three (modern) definitions at this point, for health, diet, and agriculture. Health is defined by the World Health Organization as a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity.[129] The meaning of wellbeing (usually viewed as a positive state), however, necessarily has to account for all the attributes of a person's or community's life that may contribute (or not) to well-being; this includes social, economic, psychological, and even spiritual characteristics of a person and the community in which that person lives, not forgetting the state of their health.
Diet is defined as the food and drink a person or animal consumes, and agriculture as the science or occupation of cultivating land and rearing crops and livestock. As part of agriculture, domestication of plants and animals also includes deliberate selection and breeding of wild plants and animals. Diet and health are inextricably linked, as the Frenchman Jean Anthelme Brillat-Savarin (1755-1826) indicated when he said ‘You are what you eat': ‘Tell me what you eat, and I will tell you what you are.' A balanced diet promotes a healthy immune system and mitigates against ill health. Thus, a changing diet with the transition to agriculture could have risks, but also benefits.
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