When we have health problems, we become "consumers" of resources (financial, material, affective and so on), and personal autonomy is losing ground to dependence on others (family, friends, doctors, health system, society in general), so that, our problem can become a problem of the society which, in spite of its good intentions may not be able to provide the necessary support"here and now." In order to prevent, eliminate or at least improve the causes that gave rise to the various health problems, we first need to know them. Heredity, environment and education are factors often invoked in...