Since the majority of people carry at least one recessive gene for some genetic disease, a radical policy of negative eugenics would eliminate a large portion of the human population. Explain why we might not want to eliminate all genetic disease, and provide an example of why it might be beneficial to be the carrier of a disease

Our resistance to various sorts of biological attack is dependent to a great degree on our genetic variety. Take, for example, sickle cell anemia. We know the disease only from its negative effects here in the United States, but in malarial Africa, where the disease developed, being a carrier of the disease functions to ward off the effects of malaria.